Preheat oven to 350.
In a large pan, heat up enchilada sauce till bubbling. Lower Heat and place first tortilla in the sauce. When you lift the tortilla with a spatula and the edges sag, it's ready to be taken out. Place to one side of baking dish (be conservative with space, you have to fit 12!) and fill the middle with all your goodies - lots of cheese, hearty slices of avocado, olives, cilantro, chopped onion and jalapeno, and anything else your heart desires. fold two sides of stuffed tortilla together and viola! One down.
I'll usually put the next tortilla in the sauce as I'm filling the cooked tortilla, but make sure it's not too hot or they will cook too fast. When you've finished all 12 enchiladas, smother them with any leftover sauce and top with any stuffing leftovers you may have. I like to put a big slice of avocado on top, too. stick in your preheated oven until cheese is melted, usually 10-15 minutes. Serve with black beans and Mexican style rice for a complete meal! enjoy!