This is a very easy soup that can be made in under 30 minutes. Moms will like the ease of preparation and kids will find this to their liking! It comes from Cheap! Fast! Good! by Beverly Mills and Alice Ross.
Heat oil in a Dutch oven over medium heat. Cut franks into 1/4-inch slices and add to the pot. Cook until the franks start to brown, 2-3 minutes. Add the beans and their juice, the broth, chili powder, and mustard. Stir well.
Raise heat to high and bring contents of Dutch oven to a boil. Reduce heat to medium for a moderate boil.
Meanwhile, chop green pepper and set aside.
Boil soup 10 minutes to blend flavors. Add green pepper to pot the last 5 minutes.