In a small bowl, combine the thawed corn kernels, diced red onion, chopped cilantro, and the juice from the lime to create the salsa.
Heat the olive oil in a large skillet over medium-high heat.
Add the ground beef to the skillet, breaking it into small crumbles with a wooden spoon or spatula.
Sprinkle the chili powder, cumin, garlic powder, sea salt, and black pepper over the beef.
Cook the beef until it is completely browned and no longer pink, approximately 5 to 7 minutes.
While the beef cooks, lightly toast the corn tortillas in a separate dry pan or directly over a low gas flame until warm and slightly charred.
Divide the seasoned ground beef evenly among the three warm tortillas.
Top each taco with a generous portion of the fresh corn salsa and serve immediately.