Interesting information. I’ve had the same concern regarding aluminum and have been wishing that someone would offer sear plates in stainless steel. Could you provide a link to the source for future reference?What About Cooking in Anodized Aluminum?
Aluminum cookware that has been anodized (hardened through a process that renders it nonreactive) or clad in a nonreactive material, such as stainless steel or a nonstick coating, does not leach into or react with foods.
Note: Grill grates are anodized.
When I need to sear something that can’t be done on a high-temp grill (like my gas grill), I use a cast iron grill pan with ridges in the bottom to provide a nice marking.