01 - Cook the pasta in a large pot of salted boiling water until al dente. Drain and set aside.
02 - While pasta cooks, heat a large skillet over medium-high heat. Add ground beef; cook, breaking up with a spoon, until browned and cooked through, approximately 5–6 minutes. Drain excess fat if necessary.
03 - Add the finely chopped onion to the skillet with the browned beef. Sauté for 3 minutes until softened. Stir in the minced garlic and cook for 1 minute more.
04 - Add tomato paste, diced tomato, yellow mustard, Worcestershire sauce, smoked paprika, dried oregano, salt, and freshly ground black pepper to the skillet. Cook for 2 minutes, stirring thoroughly to combine.
05 - Pour in the beef broth and bring the mixture to a simmer. If using, stir in the frozen peas. Allow to simmer for 5 minutes to allow the flavors to meld.
06 - Reduce the heat to low. Add the cooked pasta, shredded cheddar cheese, and whole milk to the skillet. Stir continuously until the cheese is fully melted and a creamy sauce coats the pasta.
07 - Taste the mixture and adjust the salt and pepper as needed to achieve the desired flavor profile.
08 - In a small separate bowl, combine the dill pickle relish, crispy fried onions, and chopped fresh parsley to create the crunchy topping.
09 - Spoon the skillet pasta into individual serving bowls and generously top each portion with the prepared pickle relish crunch.