Creating Baked Stuffed Shrimp Casserole is as simple as following these detailed steps:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C).
2. Prepare the Shrimp: In a bowl, combine the shrimp with lemon juice, salt, and pepper. Toss to coat and set aside.
3. Sauté Vegetables: In a skillet, melt ¼ cup of butter over medium heat. Add diced onion and garlic, sautéing until the onion is translucent.
4. Make the Stuffing: In a large bowl, combine breadcrumbs, Parmesan cheese, mozzarella cheese, parsley, paprika, oregano, sautéed onions, and garlic.
5. Add Broth: Pour in chicken broth and another ¼ cup of melted butter. Mix well until the ingredients are moist but not soupy.
6. Stuff the Shrimp: Place the shrimp in a greased casserole dish. Generously spoon the stuffing mixture on top of each shrimp.
7. Bake: Transfer the casserole to the oven and bake for 30-35 minutes, or until the shrimp are fully cooked and the topping is golden brown.
8. Garnish and Serve: Once baked, remove from the oven and let it cool for a few minutes. Serve garnished with additional parsley and lemon wedges if desired.

This straightforward approach ensures that you will create a delightful dish every time!