Heat olive oil in a large skillet over medium-high heat. Add the ground beef and cook, breaking it up with a spatula, until it is browned and cooked through, about 5-7 minutes. Remove excess fat if needed.

Add the chopped onions and minced garlic to the skillet with the beef. Cook for 2-3 minutes until the onions become translucent and the garlic is fragrant.

Stir in Worcestershire sauce, Italian seasoning, smoked paprika, salt, black pepper, and red pepper flakes. Mix well and cook for another minute.

Pour in the beef broth and bring to a simmer. Add the bowtie pasta and cook according to package directions, about 10-12 minutes, until al dente.

Reduce heat to low and stir in butter, half and half, and Parmesan cheese. Mix until the cheese melts and the sauce becomes creamy. Taste and adjust seasoning if necessary. Garnish with fresh parsley and serve hot.