Marinate chicken in baja citrus marinade for a few hours. Bake at 350 for 30 to 45 minutes, or until cooked all the way through. Slice into strips. Keep warm.
Meanwhile, make Spanish rice according to package (using the petite diced tomatoes).
To serve, dish some rice into a bowl. Top with some spinach and cilantro. Drizzle with salsa and dressing. Then place chicken on top.