Prepare the Batter: Whisk together the 3/4 cup coconut milk, 2 eggs, and 1 extra yolk in a shallow dish until smooth.
Prepare the Filling: Ensure your glutinous sticky rice is cooked, warm, and seasoned with a touch of coconut milk and sugar. Have your fresh mango slices ready.
Heat the Waffle Iron: Preheat your waffle iron and generously grease it with butter or oil to prevent the rice paper from sticking and to help create a golden crust.
Dip the Wrapper: Lightly moisten or prepare your rice paper, then quickly dip it into your rich egg and milk mixture so it gets a light coating.
Assemble: Place the coated rice paper onto the waffle iron, add a layer of the sweet sticky rice, and fold or top with a second sheet of dipped rice paper to enclose it.
Press and Cook: Close the waffle iron tightly and cook until the exterior is golden brown, crisp, and slightly charred in the spots.
Serve: Transfer the warm waffle to a plate, drizzle with your rich coconut sauce, garnish with sesame seeds, and serve with fresh mango chunks on the side.
Prepare the coconut sauce: heat coconut milk and agave or maple syrup in a saucepan over medium low heat. Stir until it’s thick and bubbling.