1. Put the peanut butter, honey, soy sauce, sriracha, and a tablespoon each of vegetable oil in a bowl (optional).
2. Blend until well combined.
3. Pasta should be cooked al dente in a pot. Take a look at the packaging; the cooking time varies depending on the pasta and the manufacturer.
4. When it's ready, put it in a skillet over medium heat with the sauce and a tablespoon of the pasta-boiling water.
5. You can now add the margarine and give it a gentle stir.
6. Add sesame seeds and chopped chives, if desired.