* - or regular sour cream
Mix strawberries and sugar; set aside. In a blender, whirl milk, eggs, flour, cornmeal, and vanilla until there are no lumps.
Place a flat-bottom 7-8"-wide frying or crepe pan over medium-high heat. When pan is hot, add 1/4 teaspoon butter and swirl to coat surface. Pour in 1/4 cup batter all at once; quickly tilt pan so batter flows over entire surface (don't worry if there are a few holes). Cook until surface is dry and edge is lightly browned, about 1 minute. Turn with a spatula and brown other side. Turn out onto a plate; keep warm. Repeat to cook remainder, stirring batter thoroughly before cooking each crepe (cornmeal sinks), and stacking crepes as made.
Spread 1 side of each crepe lightly with jam; fold in quarters. Offer crepes with berries and yogurt to add to taste.