Preheat grill to medium-high.
Mix batter with egg and rum, then add the nutmeg and ginger. Next, grill the pineapple slices.
As the pineapples are grilling, take a grill-friendly saucepan and add a stick of butter, ½ cup rum and the dark sugar. Let this sauce get warm and bubbly on the grill. Stir occasionally.
Once the pineapple slices have nice grill marks on both sides, take them off the grill. Layer the pineapple slices on the two pie pans. Put cherries in the middle of each pineapple slice.
Pour some of the rum sauce over the pineapple (be careful, the pan will be hot). Now, pour the batter evenly into the two pie pans.
Next, create a direct/indirect environment for baking your cake (charcoal to one side or one burner on/off).
Bake cakes about 12-15 minutes or until golden
Pull cakes out off the grill and drizzle the rum glaze over the cakes while it is still warm.
You won’t believe you made these cakes on the grill! Your friends will be surprised and impressed!!