Add olive oil to a 4-5 quart saute pan over medium high heat.
Fry the smoked kielbasa and onions.
Add garlic and cook until fragrant, about 30 seconds.
Add chicken broth, tomatoes, heavy cream, pasta, and seasonings.
Simmer for 15 minutes, or untill pasta is tender.
Remove skillet from heat and stir in 1/2 cup cheese.
Top with remaining cheese and cover until cheese is melted, spotty brown, and bubbly.
Sprinkle with sliced scallions and serve.
This only makes 4 large servings, so if you are feeding a larger group or want leftovers,I'd recommend doubling the recipe, it's well worth it! Enjoy!