Heat a 12 inch skillet over medium heat and add the olive oil.
Add the smoked sausage to the skillet and cook for about 5 minutes, until the sausage is getting some color. Add the onions to the skillet and cook, stirring often, until the onions are softened up a bit and the sausage is nicely browned, about 5 more minutes. Add the garlic to the pan and cook 30 seconds.
Add the pasta and sun-dried tomatoes to the skillet. Pour in the broth and half and half. Stir well to combine.
Bring to a boil, cover, and reduce to a simmer.
Cook for 12 minutes or until pasta is tender.
Remove the lid and stir in the grated cheese until melted.
Sprinkle with chives before serving.
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Notes
Sausage: Smoked sausage is usually sold in packs around 12-16 ounces. Any size will really work just fine. You can also use chicken sausage, brats, or even ground Italian sausage here. Sun-Dried Tomatoes: We like the ones that are dry packed for this recipe. They're packed like raisins and are good for snacking on. They rehydrate in the liquid nicely without adding a lot of oil to the dish. If you have oil-packed tomatoes, just pat them dry before adding. You can also swap in the oil from the jar for the olive oil in this recipe if that's what you're using anyway.Gruyere: This is a nutty cheese that melts nicely and adds a great flavor. We use it often in cheese sauces or mac and cheese for it's complex flavor. You can swap in Swiss, fontina, or even cheddar.