Heat 1 tablespoon olive oil in a large pot over medium heat. Add the onion and red bell pepper and cook until the onion softens.
Stir in the garlic, cumin, and diced jalapeños. Cook for one minute until fragrant.
Add the lentils, diced tomatoes, and vegetable broth. Bring to a boil, then lower the heat and simmer uncovered for 25 minutes until the lentils are tender.
While the stew simmers, heat the remaining tablespoon of olive oil in a skillet over medium-high heat. Add the corn kernels and cook without stirring for 3 to 4 minutes until some kernels char.
Season the stew with salt and black pepper. Stir in the charred corn and cook for 2 more minutes.
Ladle into bowls and top with chopped cilantro and a squeeze of lime.