Prawns in Mustard Sauce - Starter

1 1/2 pounds fresh prawns, cooked or two 6 1/2-ounce cans prawns

2 tablespoons vinegar

2 1/2 fluid ounces salad oil

salt and pepper

2 tablespoons prepared mustard

1 teaspoon paprika

2 spring onions with tops finely chopped

1 celery heart, finely chopped

Clean prawns, or drain canned ones.

Combine ingredients and pour over prawns.

Toss lightly.

Chill 2 hours.

Serve on shredded lettuce or in scallop shells.

Serves 6.