To make crepes: In a large bowl, whisk together both flours, sugar and salt. Make a well in the center; add eggs, milk and melted butter. Whisk until batter is smooth (it should have the consistency of heavy cream). Chill at least 1 hour or overnight.

Remove batter from refrigerator; it will have thickened. Stir in additional milk by tablespoons as needed until batter again has the consistency of heavy cream. Heat a 10-inch nonstick pan over medium-high heat. Melt 1/2 Tbsp. butter in pan, tilting to coat bottom of pan; pour off any excess. Pour in a scant 1/4 cup batter; tilt to spread as thinly and evenly as possible. Cook until underside is golden brown, about 1 minute. Loosen edge with a spatula, flip and cook 30 seconds more. Transfer to a plate (the first crepe or two never work). Repeat with remaining batter.

To make filling: Preheat oven to 300°. Combine yogurt, confectioners' sugar and vanilla; set aside. Line a rimmed baking sheet with foil. Spread crepes with 2 Tbsp. jam each; fold in half, then fold in half again. Place on baking sheet, arranging in a single layer. Bake about 7 minutes or until heated through. Transfer to dessert plates. Top each with a dollop of yogurt mixture. Garnish with raspberries. Dust with confectioners' sugar before serving.