Heat olive oil in a large deep saute pan over medium-high heat.
After adding the kielbasa and onions, saute them for 5-6 minutes until they are soft.
Then, add the minced garlic and let it cook for 30 to 60 seconds.
In a large saucepan, combine the chicken stock, diced tomatoes, cream, and bowtie pasta, stirring until combined.
Stir in salt and pepper and simmer for a few minutes.
The pasta should be fully cooked after 15 minutes of simmering.
Cheese should be added to the pan after it has been removed from the heat.
Let the cheese melt under the cover.
You can garnish the dish with green onions by slicing them thinly.