Add meat in to a resealable plastic bag. Mix together lime juice through salt and add to bag with steak. Turn to coat. Marinate for a minimum four hours or overnight in refridgerator.
Preheat charcoal grill to medium high. Remove steak from marinade and pat dry with paper towel. Discard leftover marinade.
Grill approximately 4 mintues per side or until pink inside and desired temperature reached. Remove from grill and let rest covered in foil.
While steak is resting grill your pineapple. Place directly on grill, no oil needed.
Grill a couple minutes per side or until the sugars in the pineapple start to caramelize and lightly brown. Remove and serve with sliced steak.
Slice meat diagonally across the grain itno 1 inch strips. Pour resting juices on top.
