Heat oven to 350°F. Spray bottom and sides of 1 full-size hotel pan with cooking spray. In blender jar on high speed, blend eggs, oil, flour and onion salt. Transfer to large mixing bowl; stir in soymilk, corn, thyme and pepper. Pour into hotel pan; bake 1 hour 15 minutes or until knife inserted in center comes out clean. Cut into 24 squares.