Cook according to package directions; drain and set aside.: Steam and salty aromas will build as the noodles simmer, so watch for tender but slightly firm texture to the bite, not soft and falling apart. Rinsing briefly under cool water can stop overcooking and remove excess starch that causes clumping, though if you prefer more sauce adhesion skip rinsing and toss with a little oil. A common mistake is leaving them in hot water while you finish other steps, which leads to limp noodles and a mushy mouthfeel.
Add all ingredients to a small bowl and whisk to combine; set aside.: As you whisk the soy sauce , hoisin sauce , rice vinegar , honey , sesame oil , ginger , and pepper, you will notice a glossy emulsion forming that smells sweet, tangy, and savory. This balance is crucial because it creates the glaze that will cling to the noodles and chicken . If the sauce tastes too sharp, add a touch more honey ; if flat, add a splash more rice vinegar . Avoid making it overly salty at this stage since reduction during cooking concentrates flavors.
To a large skillet add the oils, chicken, and cook over medium-high heat for about 5 minutes, flipping intermittently so chicken cooks evenly.: When the pieces hit the hot oil you should hear a steady sizzle and see edges begin to caramelize into golden brown spots, which adds depth of flavor. Give space in the skillet so each piece browns rather than steams; overcrowding is a frequent error that prevents proper searing. Use a blend of olive oil and sesame oil to raise the smoke point while preserving that sesame fragrance.
When chicken is about 90% cooked through, add the garlic and cook for about 1 minute or until fragrant, stirring often.: The moment you add minced garlic , the aroma will swell and the pan will smell intensely savory. Garlic cooks very quickly and can burn in seconds, becoming bitter, so keep it moving and reduce heat if it darkens too fast. This step layers aromatics into the meat and fat, which is key for a rounded final flavor.
Add the broccoli, carrots, snap peas, baby corn, optional vegetables, add the sauce, stir, cover and cook for about 3 minutes or until vegetables are crisp-tender; stir intermittently.: As the vegetables hit the hot pan you'll hear a lively hiss, and the colors should pop, especially the green of broccoli and snap peas . Adding the sauce now allows it to heat and begin to thicken, coating everything in a glossy sheen. Covering briefly encourages even cooking, but over steaming will make vegetables limp, so check texture often. Stirring intermittently helps the sauce reduce evenly and prevents burning on the pan bottom.
Turn off the heat, add the noodles, and toss well to combine; I find adding the noodles in batches and tossing as you go is easier than trying to incorporate them all at once. If your skillet isn’t large enough to accommodate the noodles, transfer the chicken and vegetables to a large bowl before adding the noodles.: The residual heat will warm the noodles through while preserving a tender chew. When you toss, you should see the sauce cling and the ingredients shine; this is the visual cue that flavors have melded. If the skillet is crowded, transfer contents to a large bowl before adding noodles , because forcing everything into a small pan can break strands and lead to uneven coating. A common misstep is trying to overmix vigorously which can bruise delicate vegetables and make the dish soggy.
Garnish with green onions, add soy sauce if desired, and serve immediately.: Freshly sliced green onions bring a bright, raw onion aroma and crisp texture as a finishing touch. If you choose to add extra soy sauce at the table, do so sparingly, tasting to avoid oversalting. Serve hot so the sauce is glossy and the textures remain vibrant; letting it sit too long causes the noodles to soak up liquid and the vegetables to lose crispness.