Sapphire Wafers. Lithium Niobate Wafers. Sapphire is a material of a unique combination of physical, chemical and optical properties, which make it resistant to high temperature, thermal shock, water and sand erosion, and scratching.
Put a tortilla on a plate, covered with a damp paper towel. Alternate tortillas with paper towels. Microwave for 30 seconds to one minute, depending on how many tortillas. Preheat the oven to 250 degrees. Wrap a stack of tortillas in a damp dish towel and place in a casserole dish of similar size. Cover with a lid or a piece of aluminum foil tightly on the dish. Place in oven for 20 minutes. Once the tortillas are heated, transfer them to a tortilla warmer to keep them nice and hot.
Preheat oven to 350 degrees F (175 degrees C). Sprinkle 1/2 cup cheese on one side of each tortilla. Place tortillas cheese side up on baking sheets, and bake 5 minutes, or until cheese is melted. Melt the butter in a skillet over medium heat. Stir in garlic and mushrooms, and cook about 5 minutes. Mix in spinach, and continue cooking 5 minutes.