Coat a Dutch oven with cooking spray; place over medium heat until hot. Add sausage, and cook until browned, stirring often. Drain and pat dry with paper towels. Set aside. Wipe drippings from Dutch oven with a paper towel.
Coat Dutch oven with cooking spray; place over medium-high heat until hot. Add tomato and next 3 ingredients; saute until onion is tender. Add sausage and flour. Cook, stirring constantly, 1 minute. Add beans and broth; stir well. Bring to a boil; reduce heat, and simmer, uncovered, 10 minutes or until thickened, stirring often. To serve, ladle soup into individual bowls, and sprinkle each serving with 1 tablespoon chopped green onions.