In a large bowl, whisk together flours, sugar, baking powder, and salt. In a medium bowl, whisk together milk, butter, and egg until combined. Stir milk mixture into flour mixture until just combined. Let batter stand, uncovered, 20 minutes.
Preheat a waffle iron and lightly coat with cooking spray. Cook waffles according to manufacturer's instructions (for standard-size Belgian waffles, fill each cavity with about 1/2 cup batter) until golden brown and crisp (for Belgian waffles, about 8 minutes).
Top each waffle with ricotta and citrus fruits, and drizzle with honey; serve.