Cook pasta to al dente as directed on package, cover and set aside, reserving 1 cup of cooking liquid.

Chop onion and bell pepper; mince garlic. Heat oil in a large sauté pan; add vegetables, garlic, salt, and pepper and cook about 5 minutes, stirring frequently.

Remove casing on sausage and add to skillet. Cook 6-8 minutes until browned, stirring to break sausage into smaller bits as it cooks.

Add kale, cover and allow to wilt: 2-3 minutes. Uncover and cook for an additional 2-3 minutes.

Add pasta to skillet along with 1/3 cup of reserved pasta water. Bring to boil. Add cheese and stir, adding more reserved water if needed. Cook for 1-2 minutes more.

Serve with grapes on the side.