Sprinkle meat with paprika. In a large skillet, melt butter over medium-high heat. Brown beef. Add broth and garlic. Simmer, covered, for 30 minutes. Add green peppers and onion. Cover and continue to simmer for 5 minutes. , Combine cornstarch, soy sauce and water; stir into meat mixture. Cook and stir until thickened. Gently stir in tomatoes and heat through. Serve over rice.