Austrian Breakfast Tacos with Spicy “Sauerkraut” and Summer Sausage recipes

Name: Austrian Breakfast Tacos with Spicy “Sauerkraut” and Summer Sausage recipes
Ingredients: 3 ounces summer sausage*, cubed; 4 eggs, beaten; 2 tablespoons freshly shredded Parmesan cheese; 4 taco-sized corn tortillas; sauerkraut; cilantro; 2 tablespoons olive oil; 1 red onion, thinly sliced; 2 cloves garlic, chopped; 3 cups shredded purple cabbage; ½ teaspoon salt; 1 tablespoon white sugar; ½ teaspoon red chili flakes; 3/4 cup chicken or veggie stock (or water), divided; 2 teaspoons white wine vinegar