Preheat oven to 400°F. Pick the sweet potatoes all over with a fork, put them
Toss the bananas into the pan and continue roasting for 10 to 15 minutes, until both the bananas and potatoes are very soft. Remove the pan from the oven but do not turn the oven off.
When the potatoes are cool enough to handle, scoop out the flesh into a large mixing bowl.
Peel the bananas and add them to the bowl along with 1 stick of butter and the honey. Season with salt and beat vigorously with a wooden spoon until everything’s well combined and the mixture is fluffy.
Spoon that into an ovenproof serving bowl and smooth the top.
In a separate mixing bowl, use your fingers to rub together the remaining stick of butter, the brown sugar, flour until the mixture is the consistency of coarse crumbs.
Bake 20 minutes, or until the crumbs are golden. Serve hot.