1 tbsp. flour
1 (20 oz.) can crushed pineapple, drained
1 tbsp. cornstarch
Big oven cooking bag
12 to 16 lb. fully-cooked ham
1/2 c. apple jelly
2 tbsp. lemon juice
1/8 tsp. 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 for 2 1/2 to 3 1/4 hours at 325°F.