In a medium bowl or mason jar, combine rolled oats and almond milk, ensuring the oats are fully submerged. Stir in the grated fresh ginger, ground cinnamon, and honey or maple syrup, mixing until all ingredients are well combined.

Gently fold in the diced ripe peaches, allowing their juicy sweetness to infuse the oats.

Cover the bowl or tightly seal the mason jar with a lid, then refrigerate the oats mixture for at least 6 hours, or overnight if possible.

In serving glasses, layer the oats mixture, followed by a generous dollop of Greek yogurt, and a sprinkle of chopped walnuts or almonds.

Finish the parfait by topping with additional yogurt and fresh peach slices before serving.