Bobby Deen's Cheeseburger Casserole

We haven't had cable TV in our house for over a year.  I truly haven't missed it at all, and most of the shows that I liked on cable I can watch online or on the Roku anyway.  My Saturday mornings are different, though, because I used to watch the Food Network all morning.  Lucky for me, if I need a cooking show fix, I can just watch The Chew!  I knew this recipe would be good when Bobby was on with the show.  

Bobby Deen's Cheeseburger Casserole

2 c. rotini pasta (I used wheat)
2 tsp. olive oil
1-1/2 c. finely chopped onion
1 clove garlic, finely chopped
1 lb. ground beef (95% lean)
3/4 tsp. salt
1/2 tsp. black pepper
2 Tbsp. tomato paste
28 ounces low-sodium diced tomatoes, undrained
2 Tbsp. dijon mustard
2 c. low-fat cheddar cheese, grated
1/4 c. chopped dill pickles

Preheat the oven to 350.  Spray a 9x13 inch baking dish with cooking spray.  In a large pot of boiling water, cook the pasta according to package directions and drain well.  In a large skillet, heat oil and cook onion until tender.  Add in garlic and cook for 2 more minutes.  Add ground beef and cook until browned.  Add salt, pepper, tomato paste, diced tomatoes and dijon mustard.  Stir until combined and cook until thickened, about 2 more minutes..  Add in pasta.  Pour into prepared baking dish and top with cheddar cheese.  Bake for 15 minutes until the cheese is melted.  Sprinkle pickles on top and serve.