Final answer:
The color dot used in Prep & Hold for an ingredient prepared at 11:00 a.m. cannot be determined without the specific color-coding system context. Typically, the color dot represents a specific day of the week or shelf-life based on the establishment's food safety procedures.
Step-by-step explanation:
The question refers to a procedure usually found in food safety and kitchen management where ingredients are labeled with colored dots to indicate when they were prepared and when they should be used by, to ensure proper food safety practices.
In kitchens that use such a system, it's essential that staff are trained on the color-coding scheme to ensure compliance with safety standards. Typically, this would involve a chart detailing what each color dot represents in terms of the day of the week or number of days an ingredient can be held before it should be discarded.