3 pkg. dry salad dressing mix (Blue cheese, Italian, cheese garlic are great)
2 onions, sliced and ringed
2 to 3 lb. fresh shrimp, cooked and peeled
1 pkg. fresh mushrooms
2 (14 oz.) cans artichoke hearts

Prepare salad dressing according to package, omit water and replace with vinegar. Mix dressing, vegetables and shrimp. Marinate overnight, stir occasionally.