Teriyaki udon is a savory Japanese noodle dish made with thick and chewy udon noodles stir-fried with a flavorful teriyaki sauce. It's a sweet and tangy umami-packed meal everyone will love.
In a large pan or wok, heat the sesame oil over medium-high heat.
Add the red bell pepper and sauté over medium heat to medium high heat for about 2-3 minutes until the pepper starts to get softer. Add the mushrooms and stir fry for about 1-2 minutes. Or longer if you want your mushrooms more on the tender side.
While the vegetables are cooking, in a small bowl combine all the ingredients for the teriyaki sauce. Whisk until well combined. Set aside.
Add pre-cooked udon noodles and stir fry for 1-2 minutes. Add the teriyaki sauce and bring to a simmer. Stir well until the sauce thickens and coats the udon noodles and vegetables. Serve immediately.