Wash and prepare the bean sprouts and seafood thoroughly.
Blanch the udon noodles in boiling water and set aside.
Heat cooking oil in a pan and sauté garlic.
Add the seafood and stir-fry over high heat.
Add bean sprouts, onion, and vegetables and stir-fry together.
Add the udon noodles and seasonings (oyster sauce, soy sauce, etc.) and stir-fry.
Season with salt and pepper to taste.
Transfer to a plate and finish with sesame oil and sesame seeds.