And it's also long enough to break protein down into smaller pieces (peptides and amino acids), these smaller pieces can connect with carbohydrates/sugard and/or creatine (in red meat) and/or nitrates (from vegetables) and form new substances. These new substances are called Hetero Cyclic Amines (HCAs).
And again this requires very high heat. The person was asking about steaming. So show us all proof that steaming vegetables can produce HCAs.
By the way nitrates are common in raw fruits and vegetables. Furthermore it is nitrites that are the issue, not nitrates: