Vegetable Casserole - cooking recipe

Ingredients

1 (18 oz.) pkg. frozen mixed vegetables
1 c. chopped celery
1 chopped onion (optional)*
1 c. grated Cheddar cheese
1 c. Miracle Whip salad dressing
1/2 c. (1 stick) margarine
1/4 lb. cracker crumbs

Preparation

*Could put 1 whole onion in center of casserole and remove before serving.