What is there to think about? Pick it up, chew, then swallow and repeat...
There are plenty of things to think about while eating besides the health value of the food you are consuming.
Have you ever examined your food as if experiencing it for the first time?
Did you ever think about how it feels in your hands? What color is it? Is it firm, soft or squishy? What does it smell like? Does it smell different after you bite it? What does it feel like on your tongue? What part of your mouth are you chewing it with? What does it taste like?
Why the heck do I want to ask all of these questions? I have more important things to focus on!
Most of the day is spent thinking about, worrying about or trying to anticipate what's going to happen next or what happened in the past. If you are sitting down to enjoy a meal then that means in the present moment...you aren't going to physically solve the complex problems of today or tomorrow. You are sitting down to fuel your body and mind so that it can perform at its best.