Beef udon recipe with black pepper

Name: Beef udon recipe with black pepper
Ingredients: 200g fresh udon noodles; 125g beef, thinly sliced across the grain; 1/4 tsp salt; 1/4 tsp baking soda; 2 tsp vegetable oil; 1 tsp cornstarch; 2 tsp light soy sauce; 1 tsp dark soy sauce; 1 tbsp mirin; 2 tsp sesame oil; 1 tbsp oyster sauce; 1/2 tsp sugar; 1/2 tsp salt; 1 tsp crushed black pepper; 1 tbsp chopped garlic; 1 medium-sized onion, sliced; 1 bell pepper. sliced (preferably mixed color for better presentation); 1 stalk celery, sliced; 5 dried shitake mushrooms, rehydrate and cut into strips; Green onions and toasted sesame seeds to garnish