Preheat oven to 400°F.
Place 1 teaspoon lard or oil in a large skillet. Heat over low heat on stovetop.
Heat tortillas, 1 at a time, in lard or oil until soft (use more lard or oil, as needed). Remove to a paper towel-covered plate to drain.
Lay out all 6 tortillas on a work surface (alternately, do less at a time, if space is limited).
Place 1/4 cup crab meat in center of each tortilla.
Sprinkle with 1 tablespoon onion.
Spread a little Salsa Con Tomatillos on top.
Roll enchiladas.
Place, seam-side down, in shallow baking dish. Repeat until all tortillas are done, if doing separately.
Cover with remaining Salsa Con tomatillos.
Sprinkle generously with cheese.
Place in preheated oven and bake about 10 minutes, or until hot and cheese melts.
While tortillas are baking, prepare avocados.
Starting at the top, with a very sharp knife, cut down into each avocado until you hit the pit. Cut completely around the avocado, top to bottom, touching the pit the entire time.
Pull the two halves of the avocado apart and remove the pit with a spoon.
Use the spoon to scoop the avocado out of the skin. Slice.
Remove enchiladas from the oven.
Place one or two on a serving plate.
Top with a dollop of Cilantro Cream Sauce. Garnish and garnish with avocado slices, olives and tomato slices.