Drizzle lemon juice over the tuna fillet then let it rest for approximately 10 minutes.

In the meantime, cut the apple then place in a bowl.

Quickly peel the carrot and shred it into pieces.

Next, cup the green jalapeno into slices then combine with apple dices, shredded carrots, and shredded cabbage.

Drizzle extra virgin olive oil over the coleslaw then toss to combine. Set aside.

After 10 minutes, rub the tuna fillet with minced garlic and pepper then set aside.

In the meantime, preheat a grill over medium heat then wait until it reaches the desired temperature.

Once the grill is ready, brush the tuna fillet with butter then place directly on the grill.

Grill the tuna until the tuna fillet is cooked through.

Remove the tuna from the grill then serve with jalapeno coleslaw and mayonnaise.