Heat 1 tablespoon of oil in a 12-inch cast-iron skillet over medium-high heat until hot. Add the corn and cook 3 minutes until it's slightly golden. Stir in ½ teaspoon of the salt and cumin and cook 1 more minute. Transfer the corn to a plate and let cool completely.
Combine the black beans, tomato, red onion, jalapeño, and garlic in a large bowl. Gently stir in the lime juice, the remaining 1 tablespoon olive oil, and ½ teaspoon salt.
Once the corn has cooled, add it to the bean mixture, along with the cilantro; gently fold to combine. Serve with tortilla chips.
