Preheat the oven to 375?F.
In a medium bowl, stir together the flour, baking powder, baking soda and salt. In a small bowl, stir together the brown sugar, oil, eggs and vanilla.
Add the wet ingredients to the dry along with the grated carrots and pear; stir just until combined, adding a handful of raisins or nuts along the way, if you like.
Scrape the batter into a parchment-lined (or greased) 8x4-inch loaf pan. Bake for 50-60 minutes, or until golden and the top is springy to the touch. Makes 1 loaf; serves 8.