In a large skillet over medium high heat, melt the butter. Add the onions in and cook, stirring occasionally, until they soften- about 2-3 minutes.
2 tbsp butter, 1 small white onion
Stir in the garlic, cooking just until fragrant, about thirty seconds. Add the ham, cooking for another 30 seconds, just until it's nice and hot.
3 tsp minced garlic, 1 1/2-2 cups chopped ham
Pour in the stock and half & half, stirring to combine. Stir in the pasta. Salt & pepper, to taste.
1 lb rigatoni pasta, 4 cups chicken broth, 1 cup half & half, salt & pepper
Bring the liquid to a boil, reduce the heat to medium, cover the pot and cook until the pasta's tender and has absorbed most of the liquid- about 8-10 minutes. Make sure to stir the pasta occasionally so that it doesn't stick to the pot or to each other in clumps.
Stir the cheese in, and serve immediately. Enjoy!
1 1/2 cups shredded colby jack cheese