Lightly spread oil/butter on inside of tinfoil to keep things from burning. Combine all the ingredients on the tinfoil. Wrap the tinfoil around all the ingredients so that they cannot spill out (if you’ll have multiple different tinfoil dinners in the fire at the same time, make sure your tinfoil wrapping looks distinctive!). Use tongs to put the tinfoil dinner in the fire- you want it to sit right on the coals. Depending on how hot your fire is, turn the dinner over in 5-10 minutes, then cook for 5-10 more minutes. Before eating, be sure to check that the meat has cooked entirely through (it is possible for ingredients on the outside to be beginning to burn and for the meat to still not be entirely cooked). Add salt and pepper (and ketchup if you want) to taste and enjoy! Served best with bug juice and eaten outside.