Melt butter in a large stew pot over moderate heat; add onions, saute until golden brown. Add garlic, salt, pepper and hot pepper. Stir-fry 2 or 3 minutes; add chicken and bell peppers. Fry stirring occasionally, until chicken browns on all sides. Mash tomatoes with a fork an mix them into the stew, along with the water. Reduce heat, cover, and simmer 10 minutes. Thin the peanut butter with a few tablespoons of hot broth from the pot. Add half of the peanut paste to the stew; continue simmering until chicken is well done Wash spinach. Place in a pot, cover, and steam (the water clinging to the leaves is sufficient for steaming) until tender. Drain and combine with remaining peanut paste. Serve greens with the stew. Serves 4 to 6. PER SERVING: 410 calories, 31 g protein, 14 g carbohydrate, 27 g fat (8 g saturated), 100 mg cholesterol, 576 mg sodium, 5 g fiber. From an article by Karola Saekel in the San Francisco Chronicle, 8/18/93.