French Toast Waffles

Name: French Toast Waffles
Ingredients: 1 (about 1-pound) loaf unsliced challah or brioche bread; 1 medium orange; 2 cups whole milk, 2% milk, heavy cream, half and half, or a combination; 8 large eggs; 1/4 cup packed light brown sugar; 1 tablespoon vanilla extract; 1/2 teaspoon ground cinnamon; 1/4 teaspoon kosher salt; 2 tablespoons unsalted butter, plus more for serving; Maple syrup, for serving; 1 cup fresh raspberries; 1 tablespoon maple syrup; 1/2 teaspoon vanilla extract; Pinch kosher salt