Veggie Teriyaki Stir-Fry with Noodles

Ingredients (9)

• 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
• 1/2 teaspoon fine sea salt
• 6 cups thinly sliced mixed vegetables*
• 1/2 cup teriyaki sauce, or more as needed
• 1 to 2 teaspoons toasted sesame oil, to taste
• 1 teaspoon sesame seeds, plus more for garnish
• 1/4 cup thinly sliced green onion, for garnish