Seafood Bake - tiny shrimp

Ingredients

• 1 (6 oz.) can tiny shrimp, drained
• 1 (5 oz.) can water chestnuts, drained and sliced
• 2 Tbsp. chopped parsley
• 2 c. cooked shell macaroni
• 1/3 c. milk
• 1 (7 oz.) can tuna or 1 (7 oz.) can crab meat, drained and flaked
• 1 c. finely chopped celery
• 2 Tbsp. chopped onion
• 1 can mushroom soup
• 1/3 c. salad dressing