In a medium bowl, mix chicken, paprika, salt and pepper.
Heat 1 tablespoon olive oil in a large skillet over medium heat. Add the chicken and cook for 10 minutes, turning after 6 minutes. Rest on a plate.
Heat the remaining tablespoon of olive oil in the same skillet over medium heat. Add spinach and onion. Stir, scraping the bits off the bottom of the pan. Cook for 5 minutes.
Add tomatoes and water and cook 5 minutes more. Return chicken to pan and stir in sour cream.