I've been making corn on the cob like this for years. It is easy and always a hit!
This is a very zesty and unusual marinade. (Best if used on thin steaks.)
Onions and mushrooms are sliced, seasoned, and wrapped inside a durable packet of tin foil, crimped to seal, and placed on the grill. Super easy with big, bold flavor. A fantastic topper for steaks, potatoes, ...This surely can be produced in an oven, but your guests will be more impressed when they learn it came off the grill!