Grammie's Green Bean Casserole

1 cup cracker crumbs
1 lb. can tomatoes
3 tbsp flour
1 can mushroom soup
1 cup sour cream
1 small onion chopped
1 tsp. salt
1/8 tsp. pepper
4 slices crisp bacon, crumbled
1 can green beans
2 tsp. butter

Sprinkle 1/2 crumbs on bottom of buttered 1 1/2 qt. casserole. Drain juice from tomatoes, blend flour in juice. Stir in soup, sour cream, salt, onion, pepper and bacon. Alternate layers of drained beans, tomatoes and sauce in casserole. Sprinkle with remained crumbs. Dot with butter. Bake for 30 minutes at 350-degrees.