2 cups fresh asparagus, cut into 2-inch lengths
1 can cream of mushroom soup
4 ounces mushrooms, sliced
2 cups grated Cheddar cheese, divided
1 can or 3 ounces French fried onion rings

Butter a casserole dish. Put a layer of asparagus on bottom, then add soup. Add mushrooms and half the cheese. Add second layer of asparagus and end with a layer of cheese. Bake at 350 degrees F or 30 minutes or until bubbly.

Sprinkle onion rings on top and return to oven for 5 minutes more.