Gourmet Cowboy Cooking III : Cowboy Mac & Cheese

Mmm, I was saving my favorite camp food for an evening after a nice long hike - this time, ten miles on the Chinle Trail at Zion National Park.  We arrive back to the campground exhausted and starving, but full of memories of amazing views of canyons and rock formations.

Serves 4

1 package of your favorite mac n cheese
1 small can diced tomatoes, drained
1 can tuna, drained
1 bell pepper, chopped
1 10 oz can whole kernel corn, drained
Optional: 3/4 cup shredded cheese

Make the mac n cheese according to the directions.  Mix in all of the remaining ingredients, and 1/2 of the cheese, if using.  Garnish with remaining cheese and serve!