Heat oven to 350°F. In a large bowl cream the butter, oil, and sugar together until smooth and creamy- about 2 minutes. Add the eggs, one at a time, along with the vanilla extract, blend until smooth. Add the peaches and blend on low speed until incorporated.
Add the almond meal and mix in thoroughly. In a small bowl, mix together the flour, baking powder, Pumpkin Spice and salt, add to the batter and mix until well-blended. Do not over blend.
While making the batter, place your cake (torte) pan in the oven and heat. When hot, add the butter and brown sugar, mix well, then top with slivered almonds and reserved ½ cup of chopped peaches. Bake for 10 minutes or until the sugar is melted and just beginning to brown. Pour the batter evenly over the top and return to the oven. Cook, 35 - 40 minutes, or a toothpick, when inserted into the center, comes out clean. Allow to rest for 10 minutes, then, if you are lucky, invert onto a plate. Cool to room temperature. Serve.