Vegan Sesame soba noodle with crispy tofu

|10 oz (around 280g) dried soba noodles (buckwheat noodles)|17 oz (500g) regular or firm tofu (or tempeh substitute)‰Cornstarch coating|1 tablespoon Tahini sauce|3 tablespoon or soya sauce‰Mixed baby salad|1 tablespoon sugar|1 tablespoon toasted sesame seeds|1 tablespoon sesame oil|1 clove garlic|1 clove onion or shallot