First, wash the boneless chicken thoroughly and cut them into small cubes.

Transfer them into a bowl and add lime juice and vegetable oil.

Marinate the chicken nicely. Cover and let it rest for about 2 hours.

Finely chop the garlic if not using garlic powder. Keep it aside.

Cut the onion into half and slice them into thin slices. Keep it aside.

Let the butter heat and then add the chicken cubes to the pan.

Add salt to taste and fry them until cooked thoroughly.

When done transfer them into a bowl. Keep them aside.

In the same pan add butter.

Let it heat and then add the sliced onion and sauté it until caramelized. Keep the flame on medium.

Now add the finely chopped garlic (skip this step if using garlic powder).

Sauté the garlic nicely until golden brown and the raw scent is gone.

Next, add the oregano and chili flakes and stir them nicely until fragrant.

Add the fresh cream and stir consistently. Keep the flame on low.

Stir everything continuously for about 30 seconds. After this add the garlic powder if not using finely chopped garlic.

Now, add the cheese slices and keep on stirring until everything comes together and the cheese melts completely.

Now, add the chicken cubes to the pan.

Combine all the ingredients well.

Add salt to taste. You can also add a splash of milk if it is too thick and sticks to the pan.

Stir everything until a thicker consistency is achieved. Transfer it to the bowl.

Take 2 slices of bread and put a thin layer of mayonnaise on both slices.

Now place a washed lettuce leaf on the mayonnaise side of one slice.

Gently place the stuffing on the bread and sprinkle some black pepper powder.

Now place another slice on top and gently press it from the top.

Do this with the rest of the slices and keep them aside.

Add some butter and let it heat. Brush it on both sides if using a sandwich griller.

When the butter is heated properly, place the sandwich on the griller and grill it until both sides turn golden brown.

Do this with all the sandwiches.

When done, cut the sandwiches diagonally and serve them hot.