Simply the Best Tuna Fish Casserole

1 package if Deluxe Macaroni & Cheese (the kind with the liquid cheese packet, not the dried cheese.
1 cup of frozen peas & carrots
1 can of any cream of soup (mushroom, celery, chicken, etc.)
1 can (6 oz) tuna, drained and flaked.
1/2 cup milk
1 cup of shredded cheddar cheese.
Fresh or dried Parsley

Prepare macaroni and cheese according to package directions ( I alway throw in an extra hand full of two of extra pasta to stretch this dish). Drain pasta, immediately stir in peas, carrots, and soup. Add tuna and milk. Pour into a 2qt. baking dish. Sprinkle with cheddar cheese and lots of Parsley. Bake uncovered for 20 minutes at 350 degrees until cheese is melted. Leftovers are delicious, just add a little milk to cream it up again.