Bring a large pot of salted water to a boil and cook the rice noodles according to package instructions until just tender; drain and set aside.
While the noodles cook, whisk together hoisin sauce, lime juice, rice vinegar, sriracha, soy sauce, minced garlic, and grated ginger in a bowl until smooth.
Heat the olive oil in a large skillet or wok over medium-high heat until shimmering.
Add the halved cremini mushrooms and sauté, stirring occasionally, for 4–5 minutes until they begin to brown and soften.
Add the red pepper strips and snow peas; cook, stirring often, for 2–3 minutes until the vegetables are just tender-crisp.
Pour the prepared sauce into the skillet and cook, stirring, for about 1 minute to warm and coat the vegetables.
Toss the drained rice noodles into the skillet with the vegetables and sauce until everything is evenly combined; season with salt and pepper to taste.
Transfer to plates, garnish with chopped scallions, and serve immediately.