Best Broccoli Casserole Ever

Ingredients
1 (20 ounce) bag frozen broccoli cuts
1 (10 3/4 ounce) can cream of mushroom soup
1 1/2 cups cheddar cheese, grated
2/3 cup margarine
1 cup seasoned bread crumbs

Directions:
1 Cook broccoli until tender, drain.
2 In saucepan, heat mushroom soup and grated cheddar cheese, until cheese melts.
3 Add cooked broccoli and stir.
4 Put in baking dish.
5 Melt margarine in pan and add seasoned bread crumbs.
6 Stir until moist with margarine and put on top of broccoli.
7 Bake at 350 F until bubbly, about 25-30 minutes.