In a stock pot cook sausage and pepper flakes over med-high heat until well browned; about 10 mins.
Drain & set aside. Cook bacon in same pot over med heat until crispy. Drain excess oil; leaving a couple of tablespoons of drippings in bottom of pot. Stir in onion and garlic and cook about 5 mins. Pour broth into pot and bring to boil. Add potatoes and boil about 15 mins. Reduce heat to medium and stir in half & half; add cooked sausage and heat through about 5 mins. Mix in the kale about 5 mins before serving.