Amish Dairy Casserole

Ingredients

• 8 cups raw potatoes, shredded
• 2 cups uncooked elbow macaroni
• 2 cups frozen peas
• 2 cups cooked ham (etc.) or 2 cups cooked sausage (etc.) or 2 cups cooked beef (etc.)
• 3 teaspoons salt
• 12 cup onion, chopped
• 4 cups cheese, shredded
• 2 quarts milk