Heat EVOO in a large stockpot over medium heat. Add onion and garlic, cook for about 5 minutes until tender, stir occasionally. Add stock, radish and s.a.l.t. sisters Blend. Bring to a boil, and then simmer until radish is soft, about 15 minutes.
Stir in browned sausage and kale. Simmer another 5 minutes. Stir in lemon juice.