Groups (sixes) cook an agreed recipe to compete with other groups, which are then judged
Agreed recipe to cook per group - see activity Masterchef - Agree Receipe
Assign a leader to oversee each group's cooking.
Get prepared, ready to start cooking.
Set a time limit and table where finish product must be presented.
Set groups cooking.
After time limit, whatever is finished must be on table.
Independent judges judge taste, texture, appearance etc. of food and choose a winner.