In a medium bowl, toss the diced chicken with taco seasoning, cayenne pepper, salt, and pepper until evenly coated.
Heat olive oil in a large skillet over medium heat. Add the seasoned chicken and cook for about 5-7 minutes, stirring occasionally, until the chicken is cooked through and no longer pink.
Add the minced garlic, diced mango, and sliced red bell pepper to the skillet. Cook for an additional 3-4 minutes, until the peppers are tender and the mango is slightly caramelized.
Meanwhile, in a separate pan, warm the corn tortillas over medium heat for about 30 seconds on each side until pliable.
To assemble the tacos, spoon some of the spicy chicken mixture onto each tortilla. Top with diced red onion and fresh cilantro.
Serve with lime wedges on the side for squeezing over the tacos.
Notes
Arrange the tacos on a large platter, garnished with additional cilantro and lime wedges for a bright, colorful display.