Heat the olive oil over medium heat in a Dutch oven or large skillet.
Saute up the sausage until cooked through, then scoop out and drain on a paper towel lined plate.
Add the onions to the pan and cook till translucent, about 6-8 minutes, then add in the fennel bulb and kale. Season generously with salt & pepper.
Add the stock to the pan and bring to a boil. Then add the pasta and gently stir in till submerged. Cook according to package directions. If using an egg noodle, this will be 4-6 minutes.
Gently stir back in the sausage and Parmesan cheese, and serve.
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