German green beans

4  cups beans, cut  in 1″ lengths (l lb.)
4 strips bacon
1 1/2 tbsp flour
2 tbsp sugar
2 tbsp vinegar
2 tbsp chopped onion
1 tbsp dill
1 tsp salt
1/4 tsp pepper
2 cup cooked diced potatoes

Cook beans in boiling salted water until just tender; drain, reserving liquid.  Cook bacon until crisp; drain reserving fat. Return 2 tbsp fat to skillet. Blend in flour and sugar. Add vinegar and 1 c. bean liquid (add water if necessary to make 1 c.). Cook, stirring constantly, until mixture is thickened and comes to a boil. Add onion, dill, salt and pepper. Combine beans and potatoes in saucepan. Add sauce and heat just until potatoes and beans are hot, stirring occasionally. Serve at once, or keep warm in oven until mealtime. Spoon into serving dish and top with bacon. Makes 8 servings.