In a small bowl, whisk together the olive oil, lime juice, salt, and pepper. Place the chicken breast in a shallow dish or zip-top bag, add the marinade, and refrigerate for 30 minutes.
Position the oven rack 5 to 6 inches below the broiler. Set the oven to broil and preheat on high.
Place the chicken on a rimmed baking sheet and broil for 5 to 6 minutes.
Remove from the oven and flip the chicken. Top with the pineapple slices and butter.
Return to the broiler and cook for about 8 minutes, until lightly browned and the internal temperature reaches 165°F. Watch closely, as broilers vary.
Transfer the chicken to a plate, cover, and let rest for 10 minutes before slicing.
Notes
Rack Position: Place the oven rack 5 to 6 inches below the broiler so the chicken cooks evenly without burning.
Preheat the Broiler: Let the broiler heat fully before adding the chicken for consistent cooking.
Flip Once: Turn the chicken halfway through cooking to ensure both sides brown evenly.
Watch Closely: Broilers cook quickly, so keep an eye on the chicken to prevent over-browning.
Rest Before Slicing: Let the chicken rest for about 10 minutes after broiling to keep it juicy.