1. Heat oil in a large saucepan over medium heat. Add onion and cook until softened, stirring often, about 6 minutes. Add pork and garlic; stir until cubes of pork are browned, about 5 minutes.
2. Add broth, tomatoes, lentils, carrots, tomato paste, chipotle powder, mustard, cumin, and pepper; stir well. Bring to a boil, reduce heat, and simmer uncovered until lentils are tender, about 30 minutes.
3. Stir in 2 teaspoons of the thyme leaves and heat 2 minutes. Ladle into 6 bowls and garnish with yogurt if desired and remaining 1 teaspoon thyme and sprigs. Serve immediately.
Source: Hannaford fresh Magazine, September - October 2012