Cook macaroni in a large pot of salted boiling water for 8-10 minutes or until al dente (check package instructions). Drain. Set aside.
Heat oil in a large frying pan over medium-high heat. Add garlic, and sauté for a minute or until fragrant. Add minced chicken. Cook, stirring to break up mince, for 10 minutes or until browned.
Add vegetables, stirring occasionally, for 3 minutes or until tender. Crumble chicken cube into the pasta. Add soy sauce, tomato sauce and white vinegar. Cook, stirring occasionally, for 2-3 minutes.
Add cooked macaroni and black pepper powder. Stir fry for 2 minutes or until heated through. Garnish with spring onions (shallots).