Heat a dry skillet over a medium/high heat. Slice the halloumi into 4 even-sized pieces. Arrange the halloumi pieces in the hot skillet. Let the halloumi sit in the skillet for a few minutes on the first side until golden. Carefully turn the halloumi and pan-fry on the second side for a few minutes more until golden brown. Once cooked, set aside.
Step 2
Thinly slice the onion. Heat the oil in the skillet and add the onion. Sweat gently over a low/medium heat for 4-5 minutes or until tender.
Step 3
Clean the lettuce leaves and arrange on serving plates. Top each lettuce leaf with a slice of pan-fried halloumi. Divide the onion between each lettuce wrap, topping the halloumi.
Step 4
Roughly dice the avocado. Drizzle the sweet chili sauce over the halloumi wraps. Top each wrap with diced avocado to serve.