Preheat oven to 400 degrees.

Mix mayonnaise with sriracha in small bowl.

Rinse scallops, pat dry, then season both sides with salt & pepper.

Place scallop shells on a baking sheet. Top each with a sea scallop and dollop of spicy mayo.

Bake until mayonnaise is golden brown, about 10 minutes.

Garnish with scallions and red pepper flakes.