8 ounces soba noodles
Coarse salt
2 tablespoons grapeseed oil
1 package (14 ounces) extra-firm tofu, drained, patted dry, and cut into 1/2-inch cubes
2 red bell peppers, ribs and seeds removed, thinly sliced lengthwise
1 1/2 pounds broccoli (1 bunch), broken into small florets, stems discarded
1 pound bok choy (1 head), trimmed and thinly sliced crosswise
4 garlic cloves, minced
1/2 teaspoon red pepper flakes
3 tablespoons almond butter
3 tablespoons rice vinegar
2 tablespoons soy sauce