Preheat the grill to medium heat. If using a griddle or skillet, place on grill to preheat as well.
Mix egg, milk, cinnamon, nutmeg together until well combined
Dip both sides of bread into the egg mixture and place on a lightly oiled griddle or skillet. May also place directly on the grill grates (If putting directly on grate, carefully spray with grill spray or oil grate beforehand with a paper towel and tongs).
Cook until the egg is set and lightly brown on both sides.
After the french toast is cooked, cover to hold warm until bananas are finished.
Bananas Foster Topping
Cut bananas into slices, and have all ingredients prepped and alongside the grill ready to use.
Heat skillet over medium heat. Add butter, cinnamon, and brown sugar to the pan.
Stir until sugar dissolves.
Stir in banana liqueur.
Add bananas to the pan. Cook until softened and start to brown lightly. Add pecans if desired
Pull pan off heat, slowly add the rum
Cook for about 10 seconds until rum is warmed then ignite with a long match or grill lighter (at the edge of the pan). If for some reason it does not ignite, carefully return the pan to the grill and cook for a minute or two until the alcohol burns off.
Bananas are finished once the flames go out. Spoon over French toast.
If desired, top with whipped cream or vanilla ice cream. Serve immediately.