In a large pot, heat the olive oil over medium heat. Add the diced onion and sauté until it becomes translucent, about 3-4 minutes.
Add the minced garlic and Italian sausage to the pot. Cook until the sausage is browned and cooked through, breaking it up into bite-sized pieces as it cooks.
Once the sausage is browned, add the diced potatoes to the pot and pour in the chicken broth. Bring the mixture to a boil.
Reduce the heat to a simmer and cook until the potatoes are tender, about 15-20 minutes.
Stir in the chopped kale and red pepper flakes. Continue to cook for an additional 5 minutes until the kale is wilted.
Pour in the heavy cream and stir to combine. Allow it to heat through for another 5 minutes.
Season with salt and pepper to taste. Serve hot, garnished with fresh parsley.
Notes
Adjust red pepper flakes to your spice preference.