1 c. butter
1 1/2 tsp. garlic salt
1 (13 oz.) pkg. oyster crackers
1 1/2 tsp. onion salt
1/2 c. Parmesan cheese

Melt butter; add seasonings. Sprinkle with cheese and mix well. Bake in slow oven (250 degrees) for 1 hour. Stir often. Store in tight container.