Hot Shrimp Salad Casserole

1 pound frozen shrimp (cooked)
2 cups diced celery
1/2 cup sliced water chestnuts
2 hard-boiled eggs, chopped
2 tablespoons grated onion
1/4 cup mayonnaise
2 teaspoons lemon juice
1/2 teaspoon salt
1/2 cup sharp Cheddar cheese, grated
1 cup crushed unsalted potato chips

Combine shrimp, celery, water chestnuts and eggs. Blend mayonnaise, lemon juice, salt and onion. Stir into shrimp mixture. Place into an 11 x 8-inch greased casserole dish. Top with cheese and potato chips. Bake at 400 degrees F for 20 minutes or until bubbly.