Cook udon noodles in boiling water for 5 minutes, drain and rinse with cold water.
Don the carrots and peppers. Cut the spring onions into slices, set aside the white and green parts separately. Chop the garlic, cut the pak choi into strips, set aside the white and green parts separately.
Mix the ingredients for the sauce well together.
Heat some vegetable oil in a pan. Add the garlic, mushrooms and the white part of the pak chois and spring onions to the pan and sauté for 3 minutes. Then add peppers and carrots and fry everything together for another 3 minutes. Mix in the green part of the pak choi and spring onions and continue frying until the pak choi leaves collapse.
Finally stir in the pasta, sauce and sprouts and heat for another minute.
You can also use other vegetables. Just take what you have left or what the season has to offer.