Preheat your oven to 375 degrees Fahrenheit and lightly grease a standard size loaf pan with vegan butter or coconut oil, then lining it with parchment paper (hanging on the sides).
In a small bowl, add the flaxseed meal and water together to a bowl, stirring and letting it set + thicken for 5 minutes; This makes the 'flax eggs'.
In a large bowl, whisk together the flour, sugar, baking powder, cinnamon, allspice, and salt until combined.
Add the flax eggs, melted vegan butter, peach preserve/jam, maple syrup, and milk to the dry ingredients, stirring everything together using a rubber spatula until combined and moist, yet thick. NOTE: If too dry, add additional milk, 1 Tbsp at a time. Fold in half of the sliced peaches.
Scoop batter in the prepared loaf pan (evenly spreading it out) and gently place the remaining peach slices on top of batter (lightly pressing them in so they stay in place). Bake it for 55-60 minutes, or until the centers come out clean once tested using a toothpick.
Once done, remove bread from oven and let it cool for 10-15 minutes before gently removing it from loaf pan to cool completely.
Slice, drizzle with additional maple syrup (if desired) and enjoy!