Only one thing is settled in advance An delicious soup will be served to the audience specially invented for this occasion by the cook Mauro Carinci Cara of Caf Bistro Elefanten

Could you correct the punctuation please?
Only one thing is settled in advance: An delicious soup will be served to the audience specially invented for this occasion by the cook Mauro Carinci Cara of Cafe & Bistro Elefanten.