Veggie Teriyaki Stir-Fry with Noodles

Bahan-bahan (4 porsi)

• 4 ounces soba noodles, brown rice noodles, spaghetti or long noodle of choice
• 2 tablespoons extra-virgin olive oil or avocado oil
• 1 medium red or white onion, halved and thinly sliced
• ½ teaspoon fine sea salt
• 6 cups thinly sliced mixed vegetables*
• ½ cup teriyaki sauce, or more as needed
• 1 to 2 teaspoons toasted sesame oil, to taste
• 1 teaspoon sesame seeds, plus more for garnish
• ¼ cup thinly sliced green onion, for garnish