This green bean casserole is different from the usual ones you see and somewhat fancier. (Nice for holiday dinners.) Large bag of frozen green beans 1 (10 oz) can/jar sliced mushrooms, drained 1 large onion, chopped 1/2 cup butter 1/4 cup flour 1 cup whole milk 1 cup heavy cream 3/4 pound cheddar cheese, shredded 2 […]