Heat oil in 4-quart Dutch oven over medium-high heat. Cook coleslaw mix, mushrooms, chicken and gingerroot in oil about 10 minutes, stirring frequently, until vegetables are tender. Stir in hoisin sauce. Reduce heat; keep warm.
Stir baking mix, milk and egg in medium bowl until blended. Stir in onions.
Lightly spray 10-inch skillet with cooking spray; heat over medium-high heat. Pour slightly less than 1/4 cup batter into skillet; rotate skillet to make a thin pancake, 5 to 6 inches in diameter. Cook until bubbles break on surface; turn. Cook other side until golden brown. Keep warm while making remaining pancakes.
Spoon about 1/2 cup vegetable mixture onto each pancake; roll up.