Plum Barbecue Sauce

1/4 c Onion; Chopped, 1 small

1/4 c Butter Or Margarine

1/4 c Chile Sauce

2 t Mustard; Dijon-style

16 1/2 oz Purple Plums; 1 cn, *

6 oz Frozen Lemonade; Thawed,1 cn

* Plums should be drained, pitted and finely chopped. ~------------------------------------------------------------------------- Cook onion in margarine in 2-quart saucepan stirring occasionally, until tender, about 2 minutes. Stir in remaining ingredients. Heat to boiling; reduce heat to low. Simmer, uncovered, 15 minutes, stirring occasionally. Makes about 2 cups of sauce.