Very cool site and pictures. Although, I am not sure I would want to be the assistant:
While your assistant holds the food against the oven base, drop a second blob of Lava on top of the food.
Ummmm...how about, just as your assistant releases the food....drop a second...
Sound like when my brother says, "hold this nail and when you are ready, nod your head and I'll hit it with the hammer."
Unchain your lunch money!