In a large wok, add vegetable oil and let heat up.
To heated oil, add 1.5 cups Chicken breast, cubed and add 1 tbsp of garlic paste, a pinch of salt (optional), black pepper, 1 tbsp oyster sauce, and ½ tsp soy sauce and stir around in wok till coated. you can add more soy if you feel like it needs more salt
Cook the chicken through about 7-10 minutes, till fully cooked. Remove and set aside.
Add more oil, then add in shrimp. To the shrimp season with another ½ tsp soy, 1 tbsp oyster sauce, a sprinkle of chicken bouillon, black pepper, and 1 tbsp of garlic paste and stir around in wok till everything is coated.
Cook the shrimp through till they turned color and develop a little brown around the edges. Remove and set aside.
Add more oil then add sliced white ends of the scallions and diced onion. Sauté until fragrant and then add the carrots and peas and season with garlic pepper. Cook until the carrots are tender.
Once vegetables are tender, add cabbage. Once the cabbage has cooked down, set all vegetables aside.
To the same wok, add about 3 cups of water, add a dash of soy sauce, oyster sauce and optional to add chicken bouillon. Make sure you taste for saltiness, if it is too salty do not add too much chicken bouillon.
Once the water comes to a boil, add in the Bihon noodles. Wait a few minutes and continue to stir and toss the noodles. All the water will be absorbed by the noodles.
Once the water has absorbed add back in the vegetables, shrimp, and chicken. Toss to combine everything
Spread noodles in a large baking dish to serve and top with lemon wedges and green part of the scallions. Squeeze the lemon right at serving for freshness.