Stir Campbell’s® soup, milk, salt, black pepper together in a bowl
Add the butter and olive oil to a sauté pan over medium heat. When hot, add the mushrooms and onions and cook until soft and golden. Remove from heat.
Add green beans, onions and mushrooms to bowl with soup mixture. Mix well.
Add in 1 cup of pepper jack cheese and stir well.
Place in 3 qt casserole dish, uncovered.
Bake at 350°F, uncovered, for 25 min. or until bean mixture is hot and bubbling. Stir bean mixture. Sprinkle with french fried onions and the remaining 1/4 cup cheese.
Bake for 5 min. or until onions are golden brown.