Which answer is a physical boundary to prevent contact when cooking allergen special order food on a grill?

Name: Which answer is a physical boundary to prevent contact when cooking allergen special order food on a grill?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Aluminum foil is a physical boundary to prevent contact when cooking allergen special order food on a grill.
Aluminum foil prevents the allergen special order food from touching the grill. This way it can be on the grill at the same time as regular orders.

Which Answer Is a Physical Boundary to Prevent Contact When