Heat olive oil over medium high heat in a large Dutch oven or soup pot.
Add sausage to the pot, stirring often and breaking up the sausage until almost browned.
Add onions, crushed red pepper, and a little salt and pepper to the sausage.
Sauté until the onions start to soften.
Add minced garlic and sauté for 30 seconds.
Deglaze the pot with ½ cup chicken broth.
Add the remaining broth and potatoes to the pot and bring to a boil.
Once boiling, reduce to a simmer and cook for 5-6 minutes until the potatoes are almost tender.
Add chopped Kale and cook for an additional 5 minutes.
Once the kale has cooked, turn off the heat and add half and half or heavy cream.
Test seasoning and add a little more salt and pepper, if needed.
Serve with crusty bread or a side salad.