Preheat the oven to 350℉ & grease a 6- cup bundt pan + 6 cupcake liners for the excess batter (see notes for more pan size information)
In a large mixing bowl combine the mashed banana, hot water & creamy peanut butter & whisk smooth making sure there are no large chunks of banana
Next add the brown sugar, salt, oil & plant milk & whisk smooth
Sift the flour & baking soda directly into the wet ingredients & whisk to a smooth batter
Pour the batter into the bundt pan filling 3/4 of the way to the top & divide the excess batter amongst the 6 cupcakes
Bake in the preheated oven (18 minutes for the cupcakes) approximately 35-40 minutes for the bundt cake - when you gently press the center it will be springy
Cool in the pan until you can safely touch it then flip out onto a cooling rack
Prepare the ganache icing according to the instructions on that post & when the cake is cooled pour it over the top & down the sides
Optional peanut butter buttercream rosettes then sprinkle the toffee & roasted peanuts over the ganache