Easy Cabbage Omelette

Name: Easy Cabbage Omelette
Ingredients: 2 ½ - 3 cups cabbage (finely chopped, about 6 oz/ 170 g, Note 1); ¾ cup carrots (grated about 3.5 oz/ 100 g Note 2); 2 tablespoons olive oil; 8 large eggs (Note 3); ½ teaspoon fine sea salt; ½ teaspoon ground black pepper; ¼ teaspoon red pepper flakes (or a pinch of cayenne pepper to taste); 1 tablespoon soy sauce ( or fish sauce); 2 green onions (finely slices); 2 tablespoons parsley (chopped, more for garnish, if desired); 1 mozzarella ball (grated, Note 4); 1 teaspoon roasted sesame seeds (white and black for garnish optional)