Cut bananas in half and slice them lengthwise.
In a small bowl, mix together melted butter and brown sugar. Slather the mixture all over the bananas and place the bananas on a grill pan (or regular pan if you don't have one) over medium heat.
Cook until the bananas are golden brown, 1-2 minutes and then flip to caramelize the other side, about 1 additional minute. Remove bananas to a plate.
Place bread slices on the grill for 2 minute per side to give them a nice toasty-ness.
Slather the peanut butter on all of the bread slices and layer the banana over the top of two slices. Drizzle the honey on top of the banana, sandwich together with the remaining bread slices, and cut in half.