Preheat an indoor or outdoor grill or skillet to medium heat.
Cut the cake into slices that are about ¾ an inch thick. Brush each side with coconut oil and place the slices on the grill or in the skillet and cook until each side is browned, about 1-2 minutes each side.
Pour the heavy whipping cream into a large bowl and beat it with an electric mixer on high speed for 3 minutes. Next, add the vanilla, maple syrup and peanut butter. Beat again until everything is combined and whipped cream is thick, 1-2 minutes.
Spread a spoonful of peanut butter whipped cream onto each slice of cake and top with fresh strawberries and a sprinkle of chopped peanuts, if desired.
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