Heat oven to 350 degrees. Bake shells on a cookie sheet for 15 to 20 minutes. Heat olive oil in a skillet. Saute peppers, onions, and mushrooms for 3 to 4 minutes. Add dried beef, cheese and beaten eggs. Cook on medium heat, stirring occasionally until eggs are set.
Transfer baked tortilla shells to serving plates. Top with even amounts of cooked egg mixture. Garnish with salsa, sour cream and olives.