Rosemary Almond Apple Galette

Name: Rosemary Almond Apple Galette
Prep time: 45 min
Cook time: 35 min
Total time: 1 h 20 min
Cuisine: Mediterranean, French, European
Ingredients: ½ Tablespoon fresh rosemary; ½ cup sugar; 1½ cups flour; 7 Tablespoons cold unsalted butter, diced; ½ cup powdered sugar; 1 tsp vanilla bean paste ((see note)); 1 egg yolk; 1 Tbsp milk ((I used whole milk)); 1 cup toasted almonds ((see note)); ½ cup unsalted butter, at room temperature ((1 stick)); 3 Tablespoons rosemary sugar ((see note)); 5-6 apples, sliced thin ((I used Gala and Granny Smith)); 2 Tablespoons rosemary sugar ((You can scale up or down to taste.)); 1 egg; 1 tsp water; 2 Tablespoons rosemary sugar, or more to taste; ¼ cup toasted almonds, chopped ((see note)); rosemary sprigs, if desired