Stir-Fried Crispy Tofu with Noodles

350 g                               firm tofu cut into small pieces2 tbsp                               peanut oil or sesame oil 1/4 cup                            low sodium soy sauce2 tsp                                finely grated ginger3/4 cup                            rice flourvegetable oil for frying 2                                    onions cut into thin wedges2                                    garlic cloves finely minced 2 tsp                               brown sugar1                                     yellow pepper cut into thin strips5                                     scallions ( green onion) cut into short lengths2 tbsp                             dry sherry2 tsp                               finely grated orange zest1   package of noodles cooked according to manufacturing instructions, to serve with or, steamed rice.