Peel bananas and slice into 1/4" pieces.
Top each banana slice with almond or peanut butter.
Place bananas on a cookie sheet lined with aluminum foil and freeze for 30 minutes.
Remove bananas from freezer and dip half of each banana slice in chocolate.
Sprinkle with sea salt. Roll in crushed nuts if you desire!
Place slices back on cookie sheet and freeze for another 15 minutes.
Store in freezer.