I first built this Wave Crest Plate on a rainy Tuesday when my kids begged for something that looked fancy but tasted like home. It is really just a cozy seafood-and-potato bake with a dramatic golden top, and it comes together in one baking dish.
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The name comes from the way the broiled edges ripple and brown like a breaking wave. You get tender shrimp, sweet bay scallops, and fluffy garlic mashed potatoes in every single scoop.
Do not stress about perfection here. If your crest looks a little lopsided, that is the charm. Mine never looks the same twice, and my family has never once complained.
Why You'll Love This Recipe
About the Ingredients
2 pounds (900g) russet potatoes, peeled and cut into 1-inch chunks
Russets give the fluffiest mash because of their high starch. Yukon Golds work too but will be a bit creamier and denser.
6 tablespoons (85g) unsalted butter, divided
Use real butter for the best flavor; salted butter works if you cut the added salt in half. Keep 2 tablespoons for brushing the top.
1/2 cup (120ml) whole milk, warmed
Warm milk keeps the potatoes fluffy instead of gluey. Half-and-half or oat milk both substitute well here.
3 cloves garlic, minced
Fresh garlic is worth it, but 1 teaspoon garlic powder can stand in. Add powder with the milk so it does not burn.
1 pound (450g) medium shrimp, peeled and deveined
Buy frozen shrimp and thaw in the fridge overnight for the best price. Pat them very dry so the topping browns instead of steaming.
1/2 pound (225g) bay scallops, patted dry
Bay scallops are sweeter and smaller than sea scallops. If using sea scallops, cut them into quarters so they cook evenly.
1/2 cup (60g) grated Parmesan cheese
Freshly grated Parm melts far better than the pre-shredded kind. Pecorino Romano is a sharper, saltier swap.
1/4 cup (30g) panko breadcrumbs
Panko gives that shattering crisp crest. Crushed cornflakes or gluten-free panko both work for a crunch.
2 tablespoons fresh lemon juice (about 1 lemon)
Fresh juice brightens the seafood; bottled lemon juice tastes flat. A splash of dry white wine can replace half of it.
2 tablespoons chopped fresh parsley
Flat-leaf parsley is milder than curly. Chopped chives or dill are lovely alternatives if you have them.
1/2 teaspoon kosher salt, plus more for the potato water
Kosher salt seasons gently and evenly. If using fine table salt, start with 1/4 teaspoon and taste.
1/4 teaspoon black pepper
Freshly cracked pepper has more aroma. White pepper keeps the mash looking clean and pale.
Tips & Tricks
Dry the seafood well
Moist shrimp and scallops steam under the broiler and turn rubbery, so blot them with paper towels before they go on the plate.
Season the potato water
Salting the boiling water like the sea seasons the potatoes from the inside, so you need less salt later.
Watch the broiler closely
Broilers go from golden to burnt in under a minute, so stay at the oven with the door cracked and pull it the second the crest ripples.
Let it rest before scooping
Five minutes of rest lets the juices settle so your portions hold their wave shape instead of sliding apart.
Pro Tips
Step-by-Step Instructions
1. Boil the potatoes
Cover the potatoes with cold water by 1 inch, add 1 tablespoon salt, and boil at a rolling simmer (212F/100C) for 15 to 18 minutes, until a knife slides in with no resistance. Drain well and let them steam-dry for 2 minutes.
2. Mash and season
Mash the hot potatoes with 4 tablespoons butter, the warm milk, garlic, 1/2 teaspoon salt, and pepper until smooth and fluffy, about 2 minutes. Taste and adjust the salt now, since you cannot fix it later.
3. Build the base
Spread the mashed potatoes in a 9×13-inch baking dish, then use the back of a spoon to pull the top into ripples and peaks like a wave. This texture is what catches the broiler and turns golden.
4. Add the seafood
Scatter the shrimp and scallops evenly over the potatoes and drizzle with the lemon juice. Tuck them into the valleys so they stay moist while the crests crisp.
5. Top and chill
Sprinkle the Parmesan and panko over the top, then dot with the remaining 2 tablespoons butter. Chill the dish uncovered for 20 minutes so the topping sets and holds its shape.
6. Bake until bubbling
Bake at 400F (205C) for 15 to 18 minutes, until the edges bubble and the shrimp curl into loose C shapes and turn opaque pink. The center should read 120F (49C) on an instant-read thermometer.
7. Broil the crest
Switch to broil on high and broil 3 to 4 minutes on the middle rack, until the peaks are deep golden brown and the panko crackles. Pull it the moment the color is right, because broilers move fast.
8. Rest and serve
Rest 5 minutes, then scatter with parsley and cut into squares with a spatula. Serve straight from the dish so every scoop gets potato, seafood, and crispy crest.
Delicious Variations
Cajun Wave
Stir 1 tablespoon Cajun seasoning into the mashed potatoes and swap the Parmesan for pepper jack cheese.
Lobster Crest
Replace the shrimp with chopped cooked lobster tail and add 1 teaspoon Old Bay to the butter.
Herb Garden Wave
Fold 2 tablespoons pesto into the mash and use mozzarella instead of Parmesan for a milder, kid-friendly top.
How to Store Wave Crest Plate
Refrigerator
Store leftovers in an airtight container for up to 3 days. The potatoes firm up in the fridge, which is normal.
Freezer
Freeze unbaked assembled portions for up to 1 month, wrapped tightly. Thaw overnight in the fridge before baking.
Reheating
Reheat covered at 350F (175C) for 12 to 15 minutes, then uncover for the last 3 minutes to re-crisp the top. Avoid the microwave, which makes the seafood rubbery.
Frequently Asked Questions
Q: Can I make Wave Crest Plate ahead of time?
Yes, you can assemble the entire dish up to 24 hours ahead and keep it covered in the fridge. Add 5 extra minutes to the bake time since it starts cold, and broil at the very end so the crest stays crisp.
Q: Why did my mashed potatoes turn gluey?
Overworking cold potatoes releases starch and makes them gluey, so mash them while hot and stop as soon as they are smooth. A ricer or food mill gives the fluffiest texture with the least stirring.
Q: Can I use frozen shrimp for this recipe?
Yes, frozen shrimp work perfectly as long as you thaw them overnight in the fridge and pat them bone dry. Wet shrimp steam under the broiler and turn rubbery instead of tender.
Q: How do I know when the scallops and shrimp are done?
Shrimp are done when they curl into loose C shapes and turn opaque pink, and scallops are done when they are firm and milky white. The center of the dish should read 120F (49C) on an instant-read thermometer.
Q: What can I serve with Wave Crest Plate?
A simple green salad with lemon vinaigrette or steamed broccoli balances the richness beautifully. Crusty bread is great for sopping up the garlicky butter at the bottom of the dish.
Give this Wave Crest Plate a try this week and tag me in your photos, because I love seeing your golden crests. Start with the potatoes, keep the broiler door cracked, and trust your eyes over the clock. Here's to small steps, big impact.
Wave Crest Plate
Wave Crest Plate layers garlicky shrimp, scallops, and buttery mashed potatoes under a golden broiled crest for a showstopping 50-minute dinner.
🧂 Ingredients
- 2 pounds (900g) russet potatoes, peeled and cut into 1-inch chunks
- 6 tablespoons (85g) unsalted butter, divided
- 1/2 cup (120ml) whole milk, warmed
- 3 cloves garlic, minced
- 1 pound (450g) medium shrimp, peeled and deveined
- 1/2 pound (225g) bay scallops, patted dry
- 1/2 cup (60g) grated Parmesan cheese
- 1/4 cup (30g) panko breadcrumbs
- 2 tablespoons fresh lemon juice (about 1 lemon)
- 2 tablespoons chopped fresh parsley
- 1/2 teaspoon kosher salt, plus more for the potato water
- 1/4 teaspoon black pepper
📋 Instructions
- 1Boil the potatoes — Cover the potatoes with cold water by 1 inch, add 1 tablespoon salt, and boil at a rolling simmer (212F/100C) for 15 to 18 minutes, until a knife slides in with no resistance. Drain well and let them steam-dry for 2 minutes.
- 2Mash and season — Mash the hot potatoes with 4 tablespoons butter, the warm milk, garlic, 1/2 teaspoon salt, and pepper until smooth and fluffy, about 2 minutes. Taste and adjust the salt now, since you cannot fix it later.
- 3Build the base — Spread the mashed potatoes in a 9×13-inch baking dish, then use the back of a spoon to pull the top into ripples and peaks like a wave. This texture is what catches the broiler and turns golden.
- 4Add the seafood — Scatter the shrimp and scallops evenly over the potatoes and drizzle with the lemon juice. Tuck them into the valleys so they stay moist while the crests crisp.
- 5Top and chill — Sprinkle the Parmesan and panko over the top, then dot with the remaining 2 tablespoons butter. Chill the dish uncovered for 20 minutes so the topping sets and holds its shape.
- 6Bake until bubbling — Bake at 400F (205C) for 15 to 18 minutes, until the edges bubble and the shrimp curl into loose C shapes and turn opaque pink. The center should read 120F (49C) on an instant-read thermometer.
- 7Broil the crest — Switch to broil on high and broil 3 to 4 minutes on the middle rack, until the peaks are deep golden brown and the panko crackles. Pull it the moment the color is right, because broilers move fast.
- 8Rest and serve — Rest 5 minutes, then scatter with parsley and cut into squares with a spatula. Serve straight from the dish so every scoop gets potato, seafood, and crispy crest.
Maya writes about sustainable living and zero-waste swaps for everyday families. She focuses on small, budget-friendly changes that actually stick, tested in her own chaotic kitchen.
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