MIX first 8 ingredients until well blended.
HEAT oil in large skillet on medium-high heat. Add cumin; cook and stir 30 sec. Add next 3 ingredients; cook and stir 5 min. until onions are crisp-tender.
STIR in mushrooms; cook 5 min., stirring frequently. Add yogurt mixture; cook 2 min. or just until mixture comes to boil, stirring constantly.
serving size = 1/2 cup (125 mL)