I bring a 12" sub from subway, grilled chicken breast. When I get it from subway I ask for the frozen chicken breasts out of the freezer, let it sit in my fridge overnight and then in my cooler on the way to the track. I take 6" of it for breakfast, wrap the chicken breast in tinfoil and toast it on my headers and toast the bread on my mufflers, doesn't take long at all. Then assemble it with the white cheeze, shreaded lettuce and pizza sauce. Ooooey gooey melted and toasted goodnessI like chicken sandwiches for lunch myself.
Wash, rinse, repeat for lunch. If I'm quick when I get off the session before lunch I don't even have to idle my bike to toast it up, exhaust is plenty hot enough.