In a medium bowl, combine honey, minced garlic, soy sauce, ground ginger, black pepper, and salt. Whisk until well blended to make the marinade.
Add the diced chicken breast to the marinade and toss to coat evenly. Let it sit for at least 15 minutes or up to an hour in the refrigerator.
Heat olive oil in a large skillet over medium heat. Add the marinated chicken pieces in a single layer and cook for 5-7 minutes, stirring occasionally, until fully cooked and caramelized.
While the chicken cooks, warm the corn tortillas on a dry skillet or griddle over medium heat for about 30 seconds on each side until soft and pliable, or microwave wrapped in a damp paper towel for 20-30 seconds.
Place spoonfuls of honey garlic chicken onto each tortilla. Top with shredded lettuce, diced tomatoes, avocado slices, and a sprinkle of fresh cilantro.
Serve immediately while warm, optionally paired with sides like Mexican street corn or fresh salsa.