2 c. macaroni shells (8 oz.)
1 c. real mayonnaise
1 (7 3/4 oz.) can marinara sauce
1/4 c. milk
1/2 tsp. salt
1/2 dried oregano leaves
4 oz. pepperoni, sliced or cut in strips
1 c. chopped celery

Cook shells according to package instructions; rinse in cold water and drain. Stir together mayonnaise, marinara sauce, milk, salt, and oregano in large bowl. Add macaroni, pepperoni, and celery; toss to coat well. Cover and refrigerate at least 2 hours.