In a bowl, combine the grilled chicken, diced pineapple, red onion, cilantro, and lime juice. Season with salt and pepper to taste. Toss to coat the mixture evenly.
Heat the corn tortillas on the grill or in a skillet until warm, flipping once.
Assemble the tacos by adding the chicken and pineapple mixture to each tortilla, distributing it evenly.
Top with optional toppings as desired.
Serve immediately and enjoy your tropical tacos.
Notes
For meal prep, the filling can be stored in an airtight container for up to three days. Tortillas should be stored separately to maintain their texture.