Mandarin Prawn Salad

1 1/2 pounds shelled and deveined large cooked shrimp

1 1/2 cups mandarin oranges

1 medium red onion, sliced

1/4 cup red wine vinegar

1/4 cup extra virgin olive oil

1/4 cup lemon juice

2 tablespoons ketchup

2 tablespoons sugar

2 tablespoons minced parsley

2 tablespoons mustard seed

2 cloves garlic, minced

1/4 teaspoon pepper

8 cups leaf lettuce

Mix shrimp, oranges and onion in glass bowl.

Mix remaining ingredients expect lettuce and pour over shrimp mixture.

Cover and refrigerate 2-4 hours.

Arrange lettuce in bowls and spoon shrimp mixture over lettuce.