Cook the soba noodles according to package directions. Drain and rinse with cold water.
Heat 1 teaspoon of canola oil in a large nonstick skillet set over medium-high heat. Add the mushrooms and cook, stirring occasionally, until the mushrooms are tender and startint to brown, 4 to 5 minutes. Season with salt and pepper, and transfer to a plate.
Heat the remaining 1 teaspoon of oil in the skillet. Add the broccoli and cook until just tender, 4 to 5 minutes. Stir in the edamame and remove from heat.
Divide the noodles, mushrooms and broccoli between two bowls. Drizzle with the peanut sauce. Serve.
The Peanut Sauce:
In a small bowl, whisk together the peanut butter, vegetable broth, soy sauce, rice vinegar, agave nectar, ginger and sriracha.