Bring a large pot of salted water to a boil

Cook pasta according to package instructions until al dente

Drain pasta and reserve a little pasta water

Heat a large skillet over medium heat

Add sliced sausage and cook until browned on both sides

Remove sausage and set aside

In the same skillet melt butter

Add minced garlic and cook until fragrant

Stir in salt, black pepper, Italian seasoning, and red pepper flakes

Add cooked pasta to the skillet

Return browned sausage to the pan

Toss everything together until coated in garlic butter

Add parmesan cheese and mix well

Add a splash of reserved pasta water if needed for sauce consistency

Garnish with chopped parsley and serve warm.