1/4 cup onion - chopped
1/4 cup butter or margarine
1/4 cup chile sauce
2 teaspoons Dijon mustard
16 1/2 ounce can purple plums - drained, pitted and finely chopped
6 ounces frozen lemonade - thawed

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.