Heat oil in a large pot over medium-high heat. Add the onion, celery, carrots and garlic; cook and stir for a few minutes to release the flavors. Season with maple syrup, cumin, chili powder, and black pepper. Pour in the vegetable broth
In a large saucepan or soup kettle, cook the sausage and onion until meat is no longer pink; drain. Add the next 12 ingredients. Bring to a boil. Reduce heat; cover and simmer for 45 minutes, stirring occasionally.