HEAT oven to 375°F.
COOK eggs in nonstick skillet sprayed with cooking spray on medium heat 5 min. or until set, stirring occasionally. Remove from heat.
PLACE 2 tortillas in 9-inch pie plate, overlapping as necessary to cover bottom; top with half the eggs and 1/3 each of the cheese and tomatoes. Repeat layers. Top with remaining tortillas, cheese and tomatoes.
BAKE 10 min. or until ingredients are heated through and cheese is melted.