Preheat the oven to 350°F. Line a 12-cup muffin tin with paper cupcake liners.
In a medium saucepan, combine the peaches, Stevia In The Raw®, Sugar In The Raw® Organic White, lemon zest, and scraped vanilla bean (optional). Cook over medium-high heat until the peaches are cooked but still somewhat intact, about 10 minutes. Remove from heat and discard vanilla pod, if used. Stir in the lemon juice and set aside.
In a large mixing bowl, combine the flour, poppy seeds, baking soda, baking powder, and salt. In a smaller mixing bowl, whisk the egg lightly. To the egg, add the oil, Stevia In The Raw®, Sugar In The Raw® Organic White, yogurt, butter, and almond extract, whisking until they are well combined. Pour the liquid ingredients into the dry, and whisk just until blended. Fold in half of the cooked peaches.
Spoon the batter into the prepared muffin tins, filling cups almost to the top. Top each muffin with about two to three peaches and a sprinkle with both sugars.
Bake for 20 to 22 minutes, or until the muffins are golden brown and spring back lightly when pressed in the center. Immediately turn the muffins out on to a wire rack to cool for at least 20 minutes.