Cook pasta according to package directions except omit salt; drain. Cover and keep warm.
Meanwhile, for sauce, in a medium saucepan combine undrained tomatoes, sweet pepper, tomato paste, chili powder, salt, garlic powder, and cumin. Bring to boiling; reduce heat. Cover and simmer over medium heat for 3 minutes. Stir in kidney beans. Stir together water and cornstarch; add to tomato mixture. Cook and stir until thickened and bubbly. Cook and stir for 2 minutes more. Serve sauce over warm pasta. Makes 3 servings.