Preheat the oven to 400 F/200 C.
In a food processor, add flour and salt and pulse twice to combine. Add butter and pulse until the mixture resembles a coarse meal.
Mix yogurt, water, and lemon juice in a medium mixing bowl, & combine with mixture in the food processor. Wrap in plastic wrap and put in the freezer to chill for 20 mins.
Asparagus Galette with Cherry Tomato and Baked Egg