- Heat taco shells as directed on package.  
- Beat together eggs, milk, salt and pepper.  
- Heat a nonstick medium skillet over medium-high heat until hot enough to sizzle a drop of water.  
- Pour in egg mixture and immediately reduce heat to medium-low.  
- As mixture begins to set, gently move spatula across bottom and sides of skillet to form large, soft curds.  
- Cook until eggs are thickened and no visible liquid remains, but they are still moist, about 1 minute.  
- Divide egg mixture among taco shells.  
- Garnish as desired with lettuce, tomato, cheese, salsa and sour cream.