First step, boil some water to cook the pasta to al dente.
Preheat oven to 375°F.
In a large skillet, brown and crumble beef over medium heat until no longer pink. Drain any grease.
Add the olive oil and onions and cook until the onions are translucent, about 3-4 minutes.
Next, add the minced garlic and cook another minute.
Stir in the mustard powder, salt, black pepper, tomato paste and spicy brown mustard. Cook for a few minutes.
Add the tomato sauce and fire roasted diced tomatoes. Stir it all together well.
Add the beef and sauce mix to the cooked and drained egg noodles and gently stir it all together.
Evenly spread the pasta, beef and sauce to a deep 9x13 or 3 quart casserole dish.
Top the casserole with shredded cheese.
Bake the casserole uncovered for 15-20 minutes until bubbly and the cheese is all melted.
Top the casserole with chopped dill pickles and serve. Enjoy!