Cook linguine according to package directions.
Before draining, carefully reserve 1 cup (240 ml) of the starchy cooking water, then drain the pasta and set it aside. 2.
While the pasta cooks, heat the peanut oil in a large skillet or wok over medium heat.
Add the onion and garlic, and sauté for 5-7 minutes until the onion is soft and golden. 3.
Add the bok choy, broccoli, snow peas, and bell pepper.
Stir-fry for 5 minutes until vegetables are vibrant. Carefully add ½ cup of water, cover, and simmer for 5 minutes until tender-crisp. 4.
Stir in the hoisin and chili garlic sauces.
Add the cooked noodles and ½ cup of the reserved cooking water, tossing everything to combine.
Add more reserved water if the sauce is too thick.
Serve immediately, garnished with chopped peanuts.
Don't skip reserving the pasta water! The starch helps the sauce cling beautifully to the noodles, creating a silkier, more cohesive dish.