In a large saute pan, over medium high heat, add oil, onion, carrots, celery, garlic, salt and pepper. Saute for 5 minutes. Add ground beef. Cook, crumble and combine with vegetable mixture. Continue to cook until no longer pink.
In a bowl, combine broth, sherry, coconut milk and miso paste. Add to beef mixture and stir to combine. Reduce heat to medium and let simmer while pasta is cooking.
Add pasta to boiling water and cook as directed on the package. Drain in colander and rinse with cool water.
In the last five minutes of the pasta cook time, remove ½ cup of liquid to a small cup. Whisk cornstarch into hot liquid. Return to pan and stir to combine. Let continue to simmer until pasta is ready.
Serve a portion of pasta in a shallow bowl and ladle miso Bolognese over the top. Sprinkle with sesame seeds