Oyster Casserole

Ingredients (18)

• 2 tbsp olive oil
• 6 tbsp unsalted butter
• ½ cup onion
• ½ cup green bell pepper
• ½ cup celery
• ¼ cup scallions
• 3 cloves garlic
• 2 16 oz containers oysters
• 8 oz mushrooms
• 2 tbsp all-purpose flour
• ½ cup half and half
• 1 tbsp fresh lemon juice
• 1 tbsp Worcestershire sauce
• 1 tbsp hot sauce
• ¼ cup Parmesan cheese
• 1 tsp Kosher salt
• ½ tsp freshly ground black pepper
• 1 cup breadcrumbs