-
Cook beans in boiling salted water until tender, about 15 to 20 minutes; drain.
-
Cut bacon in small pieces and fry until crisp, reserving 2 tablespoons of fat.
-
Add onion to bacon and cook until a golden brown; add to beans.
-
Combine flour, sugar, mustard, salt and paprika; blend with the two tablespoons of bacon fat; brown well, stirring constantly.
-
Add vinegar and water and cook until thickened (you're looking for a medium to medium/thin sauce).
-
Pour over beans and let stand in a warm place for 1/2 hour before serving.