Dont feed your grills with cheap meat. Visual language is like a cheap ad for a grill. Everyone who loves meat owns a grill, the primary target audience (You can also use a frying pan instead). So we can communicate the whole theme without showing meat oder animals.
Greenpeace against cheap meat
Guerilla marketing at places where you can by grills and brbecue stuff. You can do the same with a frying pan for example.