1. in a bowl mix together flour, sugar, salt and butter2. Incorporate the butter with flour, do it by pressing the butter with a fork until crumbs formed. 3. Gradually add 4 tbsp of iced water and stir, add another 1-2 tbsp if nedded. when the water is incorporated start to knead and form disc. Warp the dough in plastic wrap and refrigerate at least 30 min.4. slice the strawberries into 2-3. Transfer them to a large bawl. Add sugar, corn starch, lemon zest and vanilla extract. Mix well.5. Preheat the oven to 400°F (200°C).6. on a floured baking parchment roll out the dough to 12-14in/30-35cm.7. Arrange strawberries in circles starting in the center of dough, leave a 1.5-2in/3.8-5cm border, Fold edges, overlapping slightly. Brush dough with beaten egg.8. Bake until crust is golden brown and strawberry filling is bubbling. About 35-45 minutes. *stages 1-3 can be done in a blender