Preheat the oven to 200°C (180°C Fan).
Season the chicken with olive oil, paprika, salt, and black pepper.
Sauté the onion, garlic, and red pepper until softened.
Stir in the orzo and cook for 1 minute.
Add the chopped tomatoes, tomato purée, chicken stock, oregano, and white wine if using.
Place the chicken on top of the orzo mixture.
Bake for 25–30 minutes until the chicken is cooked and the orzo is tender.
Stir in spinach and sour cream if using.
Sprinkle with Parmesan, parsley, and fresh lemon juice.
Serve immediately while hot.