1Heat oven to 375º. Grease pie plate, 9x1 1/4 inches.
2Place one of the tortillas in pie plate. Cut remaining tortillas in half; arrange around center tortilla, overlapping slightly. (Round edges will form a scallop pattern around pie plate.)
3Carefully spread beans over tortillas. Sprinkle with cheeses. Mix remaining ingredients; spoon over cheeses.
4Bake uncovered 25 to 30 minutes or until hot. Let stand 5 minutes before cutting.