Once the cravings finally passed I realized they were probably a result of stress and food boredom. With a little bit of quiet time (and a LÄRABAR) I managed to make it through the evening without quitting
For now, make the best meal you can with what you have on hand. If you have some kind of starchy vegetable, include that, and be sure you've got some fat in it too. When you can get to the store, then you can have that comfort meal, so you've got something to look forward to.
Once you've eaten, think about why you want to cheat. Is there some kind of stressors in your life you need to address? Are you getting enough sleep? Are you eating enough, and the right mix of things? Is it just that you've done this before and aren't as motivated this time around (which is pretty common)? Try to figure out why you feel this way, so you can decide how to fix it.