Like s'mores, these bananas derive their gooey goodness from the heat of a grill or campfire. They go nicely with stick-roasted biscuits: simply stretch and coil refrigerated biscuit dough around a bark-free stick and roast over the fire.
For each, cut a banana crosswise into 1/2-inch-wide slices and place the slices in the center of an 18-inch-long piece of aluminum foil.
Sprinkle the banana with 2 teaspoons brown sugar, 1/2 teaspoon lemon juice, and a dash of cinnamon. Dot the banana with 1/2 tablespoon butter cut into pieces.
Bring the long edges of the foil together and fold them together. Crimp the short ends together above the packet to form a handle; make sure all seams are closed tightly. Use a long stick to place the packet on a warm grill or the coals of a campfire. Let it cook for 15 to 30 minutes.
Remove the packet from the heat, place it on a plate, and carefully open the foil. Let it cool. Top the banana with vanilla ice cream, if you like.