Follow these step-by-step instructions to prepare cheese and spinach stuffed chicken:

Step 1: Prepare the Chicken

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Butterfly the Chicken Breasts: Place each chicken breast on a cutting board. Using a sharp knife, carefully slice the chicken horizontally to create a pocket, being careful not to cut all the way through.
3. Season the Chicken: Sprinkle salt, black pepper, and paprika evenly over both sides of the chicken breasts.

Step 2: Prepare the Filling

4. Cook the Spinach: In a skillet, heat 1 tablespoon of olive oil over medium heat. Add the minced garlic and sauté for 1 minute. Add the chopped spinach and cook until wilted, about 2-3 minutes. Remove from heat.
5. Mix the Cheese Filling: In a mixing bowl, combine the cooked spinach, cream cheese, mozzarella cheese, and Parmesan cheese. Stir until well combined.

Step 3: Stuff and Cook the Chicken

6. Stuff the Chicken Breasts: Spoon the cheese and spinach mixture evenly into each chicken breast pocket. Secure the openings with toothpicks to prevent the filling from spilling out.
7. Sear the Chicken: In the same skillet, add the remaining 1 tablespoon of olive oil. Heat over medium-high heat. Sear the stuffed chicken breasts for 3-4 minutes on each side until golden brown.
8. Bake the Chicken: Transfer the seared chicken breasts to a baking dish. Drizzle lemon juice over the top. Bake in the preheated oven for 20-25 minutes, or until the chicken is cooked through and the internal temperature reaches 165°F (74°C).

Step 4: Serve

9. Remove Toothpicks: Carefully remove the toothpicks from the cooked chicken.
10. Slice and Serve: Slice each chicken breast to reveal the cheesy spinach filling. Serve hot and enjoy!