Place your chicken breast between 2 sheets of clingfilm and bash/flatten slightly with a rolling pin.
Drizzle with a little olive oil and season. (I just seasoned simply with salt and pepper)
Heat up your griddle pan to a high heat and cook on each side for around 3 minutes until fully cooked (check the chicken is no longer pink). Slice your chicken, ready for the sandwich.
Cook your streaky bacon in the griddle pan too (or however you like to cook your bacon).
Toast your bread until golden brown and ready for club sandwich building.
Spread a little mayonnaise on your first slice of bread and then add your chicken.
Add some lettuce and place your second slice of bread on top.
Again, spread a little mayonnaise on this slice then add your streaky bacon and finally some freshly slice tomato.
Finally add your last slice of bread on top, cut into halves or quarters and pierce each with a cocktail stick to hold together.
Enjoy!