1. Preheat oven to 350 degrees Fahrenheit (180 degrees Celsius). For fresh spinach: boil water and salt in a pot. Add spinach and blanch for a few minutes. Remove from heat and drain well. Chop finely.
2. If using frozen spinach, defrost and drain well. Add the garlic and season with salt and pepper.
3. To prepare the chicken, heat oil in a frying pan. Add garlic, paprika, and salt. Add the chicken to the seasoned oil and fry for three minutes on each side.
4. Place the chicken pieces in a baking pan and cover with spinach mixture. Cover pan with foil and bake for 10 minutes. Remove from oven and scatter diced peppers over the chicken.