In a large bowl, combine the zucchini, bell pepper, corn, cherry tomatoes, and red onion.
Drizzle with olive oil, then sprinkle the chili powder, cumin, salt, and pepper over the vegetables. Toss everything together until well-coated.
In a large skillet over medium heat, add the seasoned vegetable mixture. Sauté for about 7-10 minutes, or until the veggies are tender but still crisp, stirring occasionally.
While the veggies are cooking, warm the tortillas in a separate skillet or directly over a low flame for a few seconds on each side until pliable.
On each tortilla, layer a generous amount of the sautéed veggie mix, followed by diced avocado.
Top with fresh cilantro and serve with lime wedges on the side for an extra zing.