Combine flour, salt, and pepper in a food storage bag. Add chicken and toss to coat all pieces.
Melt butter over medium-low in a large skillet; add chicken and cook over medium heat until browned on all sides. Remove chicken; add onion, green pepper, garlic, curry, 1/2 teaspoon salt, and thyme, and cook until tender. Add tomatoes, breaking up. Simmer, uncovered, 10 minutes. Return chicken to skillet and simmer, covered, over medium-low heat, until chicken is fork tender and juices run clear, about 45 minutes. Add raisins and cook 5 minutes longer.
Serve with hot cooked rice.
Calories per serving: 532