Talk about easy, this dish is a no-brainer when you don't have a lot of time.
1 tube (8 oz) refrigerated cresent rolls
1 can (12 oz) white water-packed solid tuna
1 cup frozen peas and carrots
1/2 cup shredded cheddar cheese
1/4 cup mayonnaise
1 tbsp Dijon mustard
1-1/2 tsp dried minced onion
1 tsp Italian seasoning
Unroll cresent dough and separate into triangles. Place on an ungreased 12-in pizza pan (if you have one or use a large baking sheet), forming a ring with the pointed ends facing the outer edge of the pan and with the wide ends overlapping. Lightly press the wide ends together.
In a small bowl, combine the remaining ingredients. Spoon over the wide ends of ring. Fold the points over filling and tuck under the wide ends (filling will be visible).
Bake at 375 for 15-20 minutes or until golden brown and filling is hot.
I have never made this with tuna, I have made it with a sloppy joe mix though. It's called a cheeseburger ring. Fry hamburger then mix with ketchup, mustard, onion then put in ring and bake same way as your tuna one. My family loves it. Will have to try your tuna one.