Steps
1. Preheat the oven to 375°F (190°C) and grease a tart pan.
2. In a bowl, mix the gluten-free flour and cold butter until crumbly. Gradually add water until the dough comes together.
3. Press the dough into the tart pan to form the crust.
4. In another bowl, toss the apple slices with sugar, cinnamon, and lemon juice.
5. Arrange the apple slices in the crust in a circular pattern.
6. Bake for 30-35 minutes until the apples are tender and the crust is golden brown.
7. Let it cool before slicing and serving.