1 tablespoon flour
1 (20-ounce) can crushed pineapple, drained
1 tablespoon cornstarch
1 Big oven cooking bag
1 (12 to 16-pound) fully-cooked ham
1/2 cup apple jelly
2 tablespoons lemon juice
1/8 teaspoon ground cinnamon
Shake flour in cooking bag. Place in large roasting pan at least 2 inches deep. Lightly score surface of ham. Place ham in bag. Combine pineapple, jelly, lemon juice, cornstarch and ground cinnamon in saucepan; stir and cook until cornstarch dissolves. Bring to a boil. Simmer 1 minute. Pour sauce over ham in bag. Bake 2-1/2 to 3-1/4 hours.