Lentil and Black Bean Soup

Name: Lentil and Black Bean Soup
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: American
Ingredients: 2 teaspoons canola oil; 1 1/2 cups finely chopped onion; 1 large celery stalk, diced; 2 cloves garlic, minced; 1 tablespoon ground cumin; 1 tablespoon chili powder; 1 cup green lentils, rinsed and picked through; 2 (15-ounce) cans reduced-sodium black beans, drained and rinsed; 1 (14.5-ounce) can diced tomatoes; 4 cups fat-free, low-sodium vegetable broth, or chicken broth