Add the lentils, chili powder, cumin, oregano, and salt; cook and stir for 1 minute. Add broth; bring to a boil. Reduce heat; cover and simmer for 25-30 minutes or until the lentils are tender. Uncover and stir in corn; cook for 6-8 minutes or until mixture is thickened and corn is hot.
Serve hot lentils and corn in taco shells, topped with cilantro and other favorite toppings.