Sausage and Cheese Soup

1 pound ground sausage, your choice, hot or mild
1 carrot, chopped
1 small onion, chopped
1/4 cup flour
1 (14 ounce) can chicken broth
1 1/2 cups whole milk
2 cups shredded sharp Cheddar cheese
1 cup shredded Swiss cheese

In large saucepan over medium heat crumble and cook sausage, carrot and onion until sausage is brown and vegetables are softened. Sprinkle flour into pan. Cook, stirring frequently, 1-2 minutes. Gradually stir in broth and milk. Cook, stirring occasionally, until soup comes to a boil. Remove pan from heat and gradually stir in cheese. Stir until cheese is melted and smooth.