We like a bit more flavor, so I use half a packet of taco seasoning mix in the meat, and make my own dressing by simmering tomato puree with sauteed onions and garlic, and spices -- YUM! We also prefer the flavor and color of black beans. Boost the nutritional value by brushing the inside of the tortilla with olive oil before baking.
Note: this is a very wasteful method of shaping tortillas!! Lay them over the top of egg poaching cups, or small oven-safe custard cups or ramekins on a baking sheet; be creative, not wasteful!