I just love using my pressure cooker! I make french onion soup often because it's so good... I never made it in the pressure cooker and it was really easy and perfect.
Go ahead and try it. Now I used the smaller pan because I was just making enough for 4 as an appetizer serving but feel free to use the larger pot.
Also, I like the combination of chicken or vegetable and beef broth because it's a lighter broth but feel free to use all beef.