Preheat the oven to 350°F. Warm the taco shells on a baking sheet for about 5 minutes.
Cook Gwaltney Sausage in large nonstick skillet over medium heat for 5-6 minutes or until it is thoroughly cooked. Remove from skillet and cover to keep warm.
Crack eggs into a bowl, add the taco seasoning, and whisk with a fork.
In a medium nonstick skillet, heat the butter over medium-high heat until it melts and foams and bubbles.
Add eggs and reduce heat to low. Cook eggs, stirring regularly with a wooden spoon. Set aside for 4 to 5 minutes.
Line the center of each taco shell with 2 tablespoons of the scrambled eggs and sausage.
Top with some of the cheese, scallions and lettuce and a spoonful of salsa.
Garnish with chopped tomatoes, and serve with black olives and sour cream on the side.