PREHEAT oven to 375°F. Place vegetables in skillet sprayed with cooking spray; cook on medium heat 5 min. or until vegetables are tender, stirring occasionally. Remove from heat; set aside.

BEAT eggs, dressing and milk in medium bowl with wire whisk until well blended. Stir in vegetable mixture and cheese; pour into pie shell. Place pie shell on baking sheet.

BAKE on baking sheet 40 to 45 min. or until center of quiche is set and top is golden brown. Let stand 10 min. before cutting into slices to serve.