Black Sesame Otsu Recipe

From http://www.101cookbooks.com/archives/black-sesame-otsu-recipe.html

The black sesame paste I use here has become one of my standbys. I typically make extra for use on salads, broccoli, spinach, green beans, edamame, even roasted potatoes. You can make the black sesame paste a couple days in advance, if needed, and it's fine to use white sesame seeds if that's what is available to you. Lastly! Otsu leftovers make a great next-day lunch.

1 teaspoon pine nuts
1 teaspoon sunflower seeds
1/2 cup / 2 oz / 60 g black sesame seeds
1 1/2 tablespoons natural cane sugar
1 1/2 tablespoons shoyu, tamari, or soy sauce
1 1/2 teaspoons mirin
Scant 1 tablespoon toasted sesame oil
2 tablespoons brown rice vinegar
1/8 teaspoon cayenne pepper
Fine-grain sea salt
12 ounces / 340 g soba noodles
12 ounces / 340 g extra-firm tofu
Extra-virgin olive oil
1 bunch green onions, white and light green parts, thinly sliced