2 boxes of Macaroni & Cheese (prepared) 2 cups frozen peas 2 cups frozen corn 2 cans tuna (we prefer regular tuna vs. white albacore tuna) 1 can cream of celery 1 can cream of mushroom top with grated or sliced cheddar cheese 1) Prepare Mac & Cheese according to directions. 2) Fold in all remaining ingredients except for cheese topping. 3) Pour into a casserole dish and bake 350 for 30 minutes. 4) Add cheese topping and back for another 10 minutes or until cheese is melted.