I volunteered to make a green bean casserole for Thanksgiving next week with some of the people from my husband boat. Well anyways, I found this recipes I think it sounds amazing. http://allrecipes.com/Recipe/Absolutely-Delicious-Green-Bean-Casserole-from-Scratch/Detail.aspx But the only problem is my hubby can't have sour cream because of allergies. So would yogurt be an acceptable substitute in this?