Lightly sauté onion in oil over medium heat (about 4 minutes).
Add garlic and sauté for one more minute.
Add 1 1/4 cup water and turn heat to high. Add broccoli, cover, and bring to a boil. When water comes to a boil, stir, reduce heat, cover, and simmer until broccoli is tender but not mushy (about 7 to 8 minutes).
Meanwhile, prepare sauce if not already made.
When broccoli is tender, stir in cheese sauce, seasonings, and beans.
Add enough water or broth to reach desired consistency. Heat until hot.
The 5-Minute Cheese Sauce recipe makes about two cups of cheese sauce. You can use the extra as a delicious topping for baked potatoes, or, if desired, you can add more to the soup.
Makes 4 to 5 cups of soup. The exact yield will depend on how much broccoli you use, how much cheese sauce you use (step 5), and how much water or broth you add (step 6).
Recipe by JennifersKitchen at https://jenniferskitchen.com/2019/12/cheesy-broccoli-cannellini-bean-soup.html