Preheat your oven to 375°F (190°C). Gather all ingredients to streamline the cooking process.

In a large skillet over medium heat, melt the unsalted butter. Add the diced onion and minced garlic, sautéing for about 4-5 minutes until translucent.

Stir in the all-purpose flour, cooking for another 2 minutes while stirring to create a roux.

Gradually whisk in the seafood stock and bring to a simmer, allowing it to thicken for about 5 minutes.

Stir in the heavy cream, frozen mixed vegetables, Old Bay seasoning, salt, and black pepper. Simmer for an additional 3-4 minutes.

Fold in the shrimp and lobster meat, then remove from heat and stir in the shredded cheddar cheese.

Pour the seafood mixture into a baking dish or ramekins, filling about three-quarters full.

Cut each biscuit in half and arrange over the seafood mixture.

Bake for 25-30 minutes until biscuits are golden brown.

Let it rest for a few minutes, then garnish with chopped parsley before serving.