Pre heat a grill to medium heat.
Squeeze half the lemon over the chicken. Salt and pepper both sides. Grill the chicken for 7 minutes on one side. Turn the chicken over. Season to taste. Grill the chicken for another 7 minutes. Remove from the heat and squeeze the other half of the lemon over the chicken. Let it rest.
Halve the buns and sear it on the grill. (searing prevents the bun from getting soggy) Grill the pineapple to get even grill marks. Season with BBQ spice.
Build your burger and enjoy!