You can adjust for natural vs. fluorescent vs. incandescent lights and get pretty close. But when you're doing an album or a collage you can't judge shots stand-alone, but by how closely they match every other shot.

For mine, I do step-by-step tutorials. If the food changes color between shots, it's going to look like I'm assembling shots from multiple sessions. Which (just between you and me) I've actually done, but you wouldn't know because I did take the time to color match them.