Making Irresistible Peach Pie Cruffins involves several simple steps:

1. Thaw Dough: If using frozen croissant dough, allow it to thaw according to package instructions.

2. Prepare Filling: In a bowl, combine diced peaches, granulated sugar, lemon juice, cinnamon, cornstarch, and vanilla extract. Mix until peaches are coated. Set aside.

3. Preheat Oven: Preheat your oven to 375°F (190°C) and prepare a muffin tin by greasing it lightly.

4. Unroll Dough: Gently unroll each piece of croissant dough into a flat triangle.

5. Shape Cruffins: Starting from the wide end, roll each triangle tightly into a cylinder, then wrap it in a spiral to create the cruffin shape. Place each cruffin into the prepared muffin tin.

6. Fill with Peach Mixture: Spoon 1-2 tablespoons of the peach filling into the center of each cruffin.

7. Prepare Topping: In a small bowl, combine brown sugar, flour, and melted butter. Mix until crumbly and sprinkle generously over the filled cruffins.

8. Brush with Egg Wash: Brush the tops of the cruffins with the beaten egg to give them a beautiful golden color when baked.

9. Bake: Place the muffin tin in the preheated oven and bake for 20-25 minutes or until the cruffins are golden brown and puffed.

10. Cool and Serve: Once baked, remove from the oven and allow to cool in the tin for 10-15 minutes. Transfer cruffins to a wire rack to cool fully.

Following these steps will lead you to a delightful batch of Irresistible Peach Pie Cruffins, warming your kitchen with sweet, fruity aromas.