Preheat oven to 350 degrees. Spray and line (with parchment paper on bottoms) a 9x5 loaf pan, or 4 mini loaves. Set aside.

In a large mixing bowl combine the wet ingredients (pears, eggs, oil, yogurt and vanilla). Mix to thoroughly combine. In a separate bowl, combine the dry ingredients (flour, sugar, pecans, baking powder, cinnamon, nutmeg, cloves and salt). Gradually sift the dry ingredients into the wet ingredients. Stir the batter just until all the ingredients are fully incorporated. Don't over mix, or you'll get large air bubbles in the bread. Mix the crumble topping, by combining the pecans, brown sugar, flour and butter together. Mixture will be crumbly.

Pour the batter into the prepared pan(s). Evenly top with the crumble topping.

Bake at 350 for 1 hour (for 9x5 pan) until golden brown, and toothpick inserted comes out clean and free of crumbs. For four mini-loaves, bake for 35-40 minutes. Serve warm, and store leftovers in airtight container at room temperature.