If you can stand Subway Breakfast flatbread sandwiches, they are available. Like everyone else here is saying, do not go to terminal C to eat. A and B, not so bad. It is a 15 minute walk each way from the extent of B to the extent of C. I know as I had a connection just last week from B something to C4. One would think that C4 would be at the beginning of the concourse. One would be wrong. It is at the end. Jose Ceuvero (or something) right at C4 is sit down does not look bad but I have never tried it.
Here is the terminal map.