Boil a large pot of salted water over medium-high heat. Once boiling, add your favorite pasta and cook according to package instructions until al dente, usually about 8-10 minutes.

Sauté diced onions and minced garlic in olive oil in a large skillet over medium heat. Cook until the onions are translucent and fragrant, which takes about 3-4 minutes.

Add sliced sausage to the skillet and brown for about 5-7 minutes until golden crisp.

Mix in chopped bell peppers and spinach, cooking for an additional 3-4 minutes until the peppers soften and the spinach wilts.

Combine the cooked pasta with the sausage mixture in the skillet. Toss everything together gently over low heat for 2-3 minutes, allowing flavors to meld.

Serve hot, garnished with freshly grated Parmesan cheese and a sprinkle of cracked black pepper.