4 Levels of Spaghetti & Meatballs: Amateur to Food Scientist

We challenged chefs of three different levels - an amateur, a home cook and a professional chef - to make their versions of spaghetti & meatballs. And then we brought in a food scientist to review their work. Which one was the best?
Check out the professional's recipe here on the ICE blog: https://www.ice.edu/blog/pro-chef-spaghetti-and-meatballs-recipe