Seafood Bisque with Scallops, Cod, and Shrimp

Ingredients:
1 lb mixed seafood (scallops, cod, shrimp)
4 cups seafood stock (store-bought or homemade)
1 cup heavy cream
1 onion, chopped
2 cloves garlic, minced
2 tablespoons butter
Salt and pepper, to taste
Fresh parsley, chopped (for garnish)
Instructions:
Sauté the Aromatics: