The last time I made this for a block party and everyone couldn’t help but get seconds

Ingredients:

1 can shoepeg corn, drained (11 ounces)
1 can of condensed cream of celery soup
1 can green beans, drained (11 ounces)
1/2 chopped onion
1 chopped celery stalk
1/2 chopped bell pepper
½ cup shredded cheddar cheese
8 ounces sour cream
Salt and pepper to taste
1 sleeve crushed Ritz crackers
½ cup melted butter