For the pear and almond cake, peel the pears and remove the core. Cut the pears into wedges and roughly chop the walnuts.
Cream the sugar with the eggs and the oil. Stir in the almonds, the flour with the baking powder and the rum.
Add some of the chopped nuts to the batter and pour the mixture into a greased and floured springform pan. Spread the pear wedges on the dough and sprinkle the remaining nuts on top.
Bake the pear-almond cake in the oven at 170° C for about 50 minutes, covering the surface with aluminum foil after half an hour.