Cut broccolini into 2 inch pieces and wash if needed. If you do need to wash the broccolini, spin dry in a salad spinner or dry with paper towels before you cook.
Heat wok or large heavy frying pan for 1 minute over high heat, then add peanut oil, and heat 1 minute more.
Add garlic, ginger, and Chili Garlic Sauce if using, and stir-fry 15 seconds.
Add the broccolini and stir-fry about 2 minutes more. Be sure to stir constantly when you’re cooking at high heat.
Add chicken broth (or vegetable broth), cover pan, reduce heat to medium-high, and cook about 3-4 minutes (depending on how crisp you like it).
Uncover the wok and add oyster sauce (or whichever sauce you are using), then cook over medium heat 2-3 minutes more, or until broccolini is bright green and still a little tender-crisp.
Drizzle with a few drops of toasted sesame oil and serve immediately.