1 chopped onion
1 c. mayonnaise
1 can mixed vegetables
1 can corn
1 can green beans
1 c. grated cheese
1 pkg. Ritz crackers
1 stick butter

Mix onion, mayonnaise and vegetables and place in casserole dish. Cover mixture with cheese then crushed crackers. Melt butter and pour over top.

Bake at 350°F for about 30 minutes.