1 (16 ounce) package uncooked pasta shells
2 (6 ounce) cans tuna, drained
1 (10.75 ounce) can condensed cream of mushroom soup
1 (10.75 ounce) can condensed cream of celery soup
1 1/4 cups milk 1 teaspoon salt
1/4 teaspoon ground black pepper
1 teaspoon crushed garlic
4 slices processed American cheese
1 1/2 cups crushed potato chips
