Cook soba noodles according to directions on package, and cool.
Add rice wine vinegar, tamari, maple syrup, sambal, ginger, sesame oil and peanut butter to blender. Blend, adding water. Slowly add canola oil. Set aside.
In a bowl, combine chopped collard greens, vegetables, and noodles. Toss with dressing and mound on plate. Top with green onions and sesame seeds, and serve.