For a creamier version, add a splash of heavy cream to the onion mixture before combining with the pasta. To make it heartier, include sautéed mushrooms or wilted spinach.
If you’re looking for a protein boost, top the pasta with grilled chicken, sautéed sausage, or shrimp.
For a vegan twist, substitute the Parmesan cheese with nutritional yeast and ensure you use olive oil instead of butter.
