Cook the pasta according to the package instructions. Once fully cooked, drain and rinse the pasta under cold water and set it aside.

Combine the soy sauce, garlic, rice vinegar, 3 tbsp sesame oil and olive oil in a large bowl. Whisk the ingredients together. Add the pasta and toss to combine.

In a large skillet, add the remaining sesame oil to the pan over medium high heat. Add the mushrooms and cook until tender, about 5-7 minutes. Transfer the mushrooms to the pasta and toss.

Sprinkle the scallions on top of the pasta and serve.

This can be served at room temperature or cold.