Savory Stuffed Crêpes

Heat oven to 350F.

Melt 3 Tbsp. butter.

Add to whole eggs and milk in large bowl; whisk until blended.

Add flour and sugar; mix well.

Let stand 30 min.

Spray heavy 8-inch skillet with cooking spray; heat on medium heat.

Pour 1/4 cup batter into skillet; tilt skillet to evenly cover bottom of skillet with batter. Cook 1 to 2 min. or until bottom of crpe is lightly browned. Run spatula around edge of crpe to loosen from skillet; turn crpe. Cook 1 min. or until bottom of crpe is lightly browned.

Remove from skillet; set aside. Repeat with remaining batter to make 7 additional crpes.

Cook and stir mushrooms in 1 Tbsp. of the remaining butter in large skillet 3 to 5 min. or until tender.

Add remaining butter and egg whites; cook 3 to 5 min. or until eggs are set, stirring occasionally.

Top crpes with cheese, mushrooms, scrambled eggs and onions; fold in half.

Place in 13x9-inch baking dish.

Bake 5 min. or until cheese is melted.