Begin by preheating your oven to 375°F (190°C) to ensure it's hot and ready when your tacos need baking.
In a large skillet, pour in the extra virgin olive oil and place it over medium heat. Once heated, add the finely chopped onion and sauté until it becomes translucent, which should take about 3-4 minutes.
Add the minced garlic to the skillet and stir it into the onions, cooking for an additional minute until the garlic is fragrant and slightly golden.
Incorporate the ground chicken into the skillet, using a spatula to break it apart. Cook until the chicken is no longer pink, which should take about 5-7 minutes. Make sure to stir occasionally for even cooking.
Once the chicken is cooked through, sprinkle in the taco seasoning along with the rinsed black beans and sweet corn. Stir thoroughly to combine everything, cooking for 2-3 minutes until heated through.
On a baking sheet, arrange the small flour tortillas flat. Using a spoon, fill each tortilla with a generous portion of the chicken mixture. Top each filled tortilla with a sprinkle of shredded sharp cheddar cheese.
Gently fold each tortilla in half, placing them seam-side down on the baking sheet to keep them closed during baking. Arrange them neatly for even cooking.
Place the baking sheet in the preheated oven and bake for about 10-12 minutes, or until the tortillas are golden brown and crispy. Keep an eye on them to prevent burning.
Once baked, remove the tacos from the oven and allow them to cool slightly. Top each taco with diced tomatoes and diced avocado generously. Add a dollop of sour cream or Greek yogurt on top for that creamy finish.
Finally, finish off with a sprinkle of fresh cilantro leaves to brighten up the flavors before serving.
Notes
Serve with lime wedges and extra sour cream or Greek yogurt on the side.