Apple and Cranberry Galette

INGREDIENTS

• 1 3/4 cups all-purpose flour
• 6 Tbs. white cornmeal
• 2 tsp. sugar
• 3/4 tsp. salt
• 12 Tbs. (1 1/2 sticks) cold unsalted butter, cut into 1/2-inch chunks
• 6 Tbs. sour cream
• 1/2 cup ice-cold water
• 1/2 cup sugar
• 1/2 cup water
• 3 Tbs. honey
• 3 Tbs. fresh lemon juice
• 1/2 tsp. ground cinnamon
• 8 large Granny Smith apples, about 4 lb. total, peeled, cored and sliced
• 1 1/2 cups fresh cranberries
• 2 Tbs. unsalted butter, cut into thin slices
• Sugar for dusting (optional)
• Crème fraîche for serving (optional)