Follow these straightforward steps to create the amazing Blueberry Peach Crisp:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Prepare the Fruit Filling: In a large bowl, combine the blueberries, sliced peaches, granulated sugar, cornstarch, vanilla extract, and lemon juice. Toss gently to coat the fruit evenly.
3. Transfer to Baking Dish: Pour the fruit mixture into a greased 9×13-inch baking dish.
4. Mix Dry Ingredients: In a separate bowl, mix together the rolled oats, brown sugar, all-purpose flour, cinnamon, and salt.
5. Incorporate Butter: Drizzle the melted butter into the dry mixture, stirring until it resembles crumbly sand.
6. Spread Topping: Evenly distribute the oat topping over the fruit mixture in the baking dish.
7. Bake: Place the baking dish in the preheated oven and bake for 30-35 minutes, until the topping is golden brown and the filling is bubbly.
8. Cool Down: Once done, remove the crisp from the oven and allow it to cool for 10-15 minutes.

Following these simple steps, you’ll have an impeccable Blueberry Peach Crisp ready to shine at your table.