Place tortillas on a 12x16-inch cookie sheet and toast in a 350-degree oven for about 4 minutes, or until lightly crisped. Now, divide the remaining ingredients, in order listed, equally over the tortillas and bake in a 350-degree oven for 5 minutes or until cheese is bubbly. Serve at once. Serves 6. (About 183 calories per serving) Note: This is also delicious with broccoli, cauliflower, carrots, etc. but vegetables must first be blanched by placing in boiling water for 3 to 4 minutes, or until firm tender.