Cook pasta according to package
directions.
Make sauce by whisking tamari, rice
wine vinegar, lemon juice, garlic, sesame oil, and red pepper flakes together in a
small
bowl.
While pasta is cooking, heat peanut
oil in a wok or large frying pan over medium-high heat. Stir-fry peppers and onions.
Add
broccoli and mushrooms when onion and peppers begin to soften. Stir in tomatoes and
sauce. Add noodles and mix well.
Can be served hot, at room
temperature, or chilled (as a side dish to grilled salmon, for instance).