1-First Step: Prepare Your Ingredients and DoughStart by gathering and measuring all ingredients on a clean surface chill the butter, slice 4 ripe peaches, and mix 1 1/2 cups flour with 1/4 cup sugar, taking about 10 minutes for mise en place. This step ensures smooth baking; for vegan options, use coconut oil in the dough to begin your mini peach tarts assembly.

2-Second Step: Make the Tart CrustIn a bowl, cut 1/2 cup chilled butter into the flour-sugar mixture until it forms crumbs, then add a splash of ice water (about 2-3 tablespoons) to form dough; knead lightly for 2 minutes. Roll out to 1/4-inch thickness and cut into small circles for tart molds, which takes 5-7 minutes at room temperature. For gluten-free adaptations, use a gluten-free flour blend here to keep the crust intact for mini peach tarts.

3-Third Step: Prepare the Peach FillingIn another bowl, toss sliced peaches with 2 tablespoons cornstarch, 1 tablespoon lemon juice, and 1/2 teaspoon cinnamon, mixing for 1-2 minutes to coat evenly. This creates a juicy filling that holds together; if making low-calorie tarts, reduce any added sugar in this step to maintain lightness in your mini peach tarts.

4-Fourth Step: Assemble and Bake the TartsPress dough circles into mini tart pans, fill each with the peach mixture, and brush edges with 1 beaten egg for a golden finish this assembly takes about 5 minutes. Bake in a preheated oven at 375°F for 20-25 minutes until the crust is golden and filling bubbles; monitor closely to avoid over-baking, and adapt for dietary needs like vegan substitutes to perfect your mini peach tarts.

5-Final Step: Cool, Garnish, and ServeRemove tarts from the oven and let cool in pans for 10 minutes before transferring to a wire rack; once cooled, garnish with a dusting of powdered sugar or fresh mint for extra appeal, ready in about 15 minutes total cooling time. This step finalizes the tarts, and for various preferences, add low-calorie toppings to enjoy your mini peach tarts at their best.