Create a delicious spinach and feta stuffed chicken breast using a food processor. Blend together spinach, feta cheese, garlic, and herbs until well combined. Cut a pocket in each chicken breast and stuff it with the spinach and feta mixture. Season the chicken with salt, pepper, and your choice of spices. Bake until the chicken is cooked through and the filling is melted and gooey. Serve with a side of roasted vegetables for a satisfying dinner.