First cut bread slices into triangles. But keep it aside of each other.

Mix melted butter with olive oil, black pepper, garlic, chilli flakes and pinch of salt and mix it. Put it in fridge for 10 mins.

Spread cold butter on slices and grate cheese cubes on top.

Toast this slices either in oven for 10 mins max on 170 or on gas till it get golden crust.