Peach Almond Galette

Name: Peach Almond Galette
Prep time: 30 min
Cook time: 45 min
Total time: 1 h 15 min
Cuisine: European, Mediterranean, French
Ingredients: 1/2 cup unsalted butter, cold ((1 stick)); 1 1/4 cup all-purpose flour; 1/2 Tablespoon sugar; 1/2 teaspoon salt; 1/4 cup buttermilk ((or use regular milk mixed with 1/2 tsp vinegar)); 3 medium peaches, sliced (or 2 large peaches); Zest and juice of 1/2 a regular lemon (or 1 small lemon); 1/2 cup granulated sugar; 4 Tablespoons cornstarch; Pinch of salt; 1/2 teaspoon almond extract; 1 egg, beaten with 1 teaspoon cream or water; Sliced almonds; Coarse or turbinado sugar