Buttermilk Waffles with Homemade Strawberry Sauce

INGREDIENTS

• 1/2 teaspoon vanilla extract
• 3 large eggs, separated
• 1 cup buttermilk
• 2 tablespoons butter plus 1 tablespoon, melted
• 1/4 teaspoon baking powder
• 1 tablespoon cornstarch
• 1/2 teaspoon ground cinnamon
• 1 lemon, zested and juiced
• 1 quart strawberries, hulled and sliced
• 1/4 cup water
• 1 cup unbleached all-purpose flour
• 1/4 cup sugar
• 1 teaspoon baking soda
• 3 tablespoons brown sugar
• 1/2 teaspoon salt
• Pinch cream of tartar