Heat oil in a large pot.

Add onion and capsicum and cook until soft.

Remove from heat and add garlic, tomatoes, salt, sugar and mixed herbs.

Using a stick blender, blend the sauce until smooth.

Return to heat and cook over medium heat for 30 minutes.

Bring a separate pot of water to a boil.

Add pasta to boiling water and cook until just soft then drain.

Add chicken to sauce and return to a boil.

Mix sauce and chicken through pasta.

Chop parsley.

Serve pasta, sauce and chicken with cheese and parsley to garnish according to quantities below.