Longer and better dreams

I stated Learning about lucid dreams about a mouth and ago and in that Time I've had 5 LDs. The thing is that the dreams that I have no control over are getting longer and more life like. I'm even eating food in the dreams which I never did before. Is there anyway I can use this for dream signs?

Is the food you eat in your dreams somehow different than your usual nutrition?

Maybe do reality checks everytime you eat (something new)?

Thanks, I'll do that. Anyway the food in my dreams are fast foods, but not small.