Heirloom Tomato Galette with Mascarpone and Herbs

Name: Heirloom Tomato Galette with Mascarpone and Herbs
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: American, French, Italian
Ingredients: 1 ½ cup all-purpose flour (spooned and leveled (192g), plus more for sprinkling); 1 tbsp dried Italian herb blend; ½ cup salted butter; 5 tbsp ice cold water; 6 oz mascarpone (room temperature - you can also substitute cream cheese if you can't find mascarpone); 2 cloves fresh garlic (minced); 1 tsp lemon zest; ¼ tsp salt; ¼ tsp pepper; 1 egg (beaten); 1-2 lbs ripe heirloom tomatoes (sliced, assorted sizes); 3 tsp fresh herbs of your choice (chopped (I used basil, thyme, chives, Italian oregano, and sage)); 1 egg (beaten with 1 tbsp water); Sea salt and freshly cracked pepper