The size of the banana would depend on the size of your bread slice and your personal preference. I use a medium banana for this recipe.
Thinly slice the banana.
Add the peanut butter on both the slices. (or the variations as mentioned above). The amount will depend on your taste. Refer tip 3.
Spread it thinly on both the bread slice.
Arrange the banana slices on top of one bread.
Since I love banana, I tend to get generous and overlap it a bit, but its not necessary. You can at this point also drizzle honey if you like. Refer my variations
Press down the other bread over this.
Grease a pan lightly with either oil or butter and when hot, add the sandwich to it.
Press it down with something heavy. I place a wax paper on top of the sandwich and use a heavy container on it. If you have a Panini maker, use it instead. You can use a regular skillet or a grill pan to make this sandwich.
After a minute or so, turn it on the other side. You can add a touch of butter on top of the uncooked bread before turning it bottom side if you like. Cook until done.
Slice half way and serve.