Sheet-Pan Shrimp Gratin

Step 1

Heat oven to 425 degrees.

Step 2

In a large bowl, toss together the shrimp, zucchini, mushrooms, shallot, garlic, paprika, red-pepper flakes, ½ teaspoon herbes de Provence, ¾ teaspoon salt, ½ teaspoon black pepper and 1 tablespoon oil until well combined. Transfer to a 9-by-13-inch sheet pan or shallow baking dish in a single layer.

Step 3

In the now-empty bowl, toss the panko with a pinch of salt, the remaining 2 tablespoons oil and ¼ teaspoon herbes de Provence to combine. Evenly pour the cream over the shrimp mixture in the pan, covering all the nooks and crannies. Sprinkle the panko mixture over the shrimp, then top first with the mozzarella, followed by the Gruyère.

Step 4

Bake until the cream is bubbling and the panko and cheese are light golden brown all over, 10 to 15 minutes. Remove from the oven and let rest for 5 minutes before serving with the fresh lemon wedges, which should be squeezed over the gratin just before serving.