Bring a medium-sized pot of salted water to a boil and cook the pappardelle pasta according to package instructions until al dente, about 7-10 minutes.
While the pasta cooks, heat a large skillet over medium heat and add the ground beef, season with garlic powder and a pinch of salt, and cook until browned, about 5-7 minutes.
Add minced garlic to the beef and sauté for another 1-2 minutes until fragrant.
Stir in diced tomatoes, chicken broth, and thinly sliced red bell pepper.
Add dried oregano, dried basil, garlic salt, and crushed red pepper flakes, and let the sauce cook together for 3 minutes.
Drain the pasta and add it directly to the skillet, tossing to coat thoroughly in the sauce.
Serve immediately, topped with chopped parsley and grated Parmesan cheese.