Take a large bowl, and combine blueberries, lemon juice, sliced peaches, vanilla extract, lemon zest, granulated sugar and flour. Gently hurl the bowl until the fruits are well coated.
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Take a large bowl, and start preparing crumble topping. Add flour, oatmeal, brown sugar, salt, cinnamon and granulated sugar in the bowl, and stir it together gently with a beater. Add butter in the bowl, and mix it together with your fingers until it is mixed properly and big crumbles are formed.
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Put the fruit mixture in a 2 quart ceramic glass baking dish. Sprinkle the crumble mixture properly at the top of the fruit mixture. Take a pan, place a parchment paper on it, and put the pan in the preheated oven. Bake it for around 35 to 40 minutes until a golden brown top is achieved. The Peach and Blueberry Crumble is ready. It can be served as a proper snack at the tea or a genuine dessert after dinner. Serve as you need.
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