Heat oven to 400°F. Line rimmed baking sheet with parchment paper.
Place chicken thighs on baking sheet. Coat with olive oil and liberally season with salt and pepper. Bake 20 minutes or until chicken thighs have reached 165°F. (Chicken may also be cooked on a grill).
While chicken is baking, mix together salsa ingredients.
Remove chicken from oven. Chop or shred chicken and toss with barbecue sauce.
To assemble tacos, divide chicken and shredded muenster among tortillas. Fold and top with some salsa. Serve remaining salsa on the side.