Start by dicing the boneless, skinless chicken breasts into bite-sized pieces. Set aside.
In a large skillet, heat the olive oil over medium-high heat until hot but not smoking.
Add the diced chicken and spices to the hot pan. Stir and cook for about 5-7 minutes until golden brown.
Add the pineapple chunks and stir occasionally for about 3-4 minutes until heated through.
Squeeze in the juice of one lime and stir to combine.
Warm the tortillas in another skillet for about 30 seconds on each side.
Assemble the tacos with the chicken and pineapple mixture, topped with red onion, cilantro, avocado, and jalapeño. Serve with lime wedges.