Saute onions, carrots and garlic in olive oil, over medium heat until softened.
Add sausage, and cook, browning on all sides. Once the sauce is cooked, remove from the pot and slice. Then add the sausage pieces back to the pot.
Pour in broth, one cup water and scrape up brown bits from the bottom of the pan.
Add lentils and sweet potatoes. Bring to a boil, then reduce heat and cover. Cook on low for 30-40 minutes until lentils and sweet potatoes are tender. Check the liquid level - if it gets too low, add a ½ cup of water.
Add salt and pepper to taste. Enjoy with gluten free crackers or bread and butter.
Notes
Store leftover soup in the refrigerator. It should stay fresh for about 4 days.You can freeze leftovers of this soup. Store in a freezer safe container or freezer bag - the soup should stay fresh frozen for about 3 months.