Bring a medium pot of water to a boil. Add the noodles and salmon and boil for 2-5 minutes or until the salmon is cooked through (depends on thickness). Transfer the salmon to a cutting board and continue to cook the noodles until they are done.
Reserve about 1 cup of the noodle water, then drain and rinse with cold water to cool them down until they are just warm.
Meanwhile, in a large bowl, whisk together the tahini, peanut butter, soy sauce, vinegar, maple or honey, sesame oil and salt until smooth.
Add the noodles to the large bowl and toss to coat in the sauce. If the sauce seems too thick/pasty, add in a splash of the noodle water and toss again.
Peel off the skin from the salmon and flake it into chunks. Season with a sprinkle (about 1/4 teaspoon) of salt.
Serve the noodles topped with salmon, thinly sliced veggies, herbs, and sesame seeds. Squeeze lemon generously all over. Top with chili oil, if using.