Preheat the broiler (overhead grill).

Place one tortilla onto a small baking sheet and load it up with cheese. Put it under the broiler to melt. 

Meanwhile, quickly scramble one egg with some salt and pepper in a small saucepan.

Once the cheese has melted, spread lay the bacon over the top, then spread the cooked egg over the bacon.

Add a little extra cheese to act as glue and top with the remaining tortilla. Place it back under the heat until crispy, then flip it over and cook the other side.

Cut it into quarters and serve with a little sour cream.