1. Preheat broiler. Arrange tortillas on nonstick baking sheet and brush each tortilla with 1/4 of the margarine and sprinkle with 1/4 of the cinnamon. Broil 6 inches from heat source until margarine is bubbly, 1 to 2 minutes.
2. Combine remaining cinnamon with the sugar. Turn tortillas over; brush each with half of the remaining margarine and then sprinkle each with half of the cinnamon-sugar mixture. Broil until cinnamon-sugar mixture caramelizes, about 1 minute.