Adjust oven rack to the middle position and preheat to 350°F. Line a 9- by 5- loaf pan with a 9 inch aluminum foil sling so that the ends of the foil hang over the sides of the pan (making it easier to remove the loaf after it is done baking). Spray with non-stick cooking spray and set aside.
In a medium bowl, whisk together flour, garam masala, salt, baking soda and baking powder.
In a large bowl, beat eggs until fully combined. Whisk in agave, vegetable oil and vanilla extract.
Add flour mixture to wet ingredients, mixing until just combined. Stir apples into batter until evenly distributed.
Pour batter into prepared loaf pan and sprinkle with granulated sugar. Bake bread until golden and a cake tester comes out clean, about 40-45 minutes. If you have a thermometer, I baked mine until it was 195°F and it came out moist.
I haven't tried these substitutions, but I am assuming you can use all-purpose flour for the spelt, honey or maple syrup for the agave and possibly coconut oil for the vegetable oil. Let me know how they work if you try it!