Eating - Self Reflection

Why is it everytime I sit down to enjoy some sort of eatable treat.. I find myself forgetting how delicious whatever it is I am eating. And instead find myself deep in confronting thought? This is becoming ever so common that today I was eating Yoghurt and Granola and began thinking all sorts, to then two minutes later ( or so) find that all of my yoghurt was gone and the Granola was indeed all over the table aswell as on my Chest…..
Looking back now, I don’t even know what I was so deeply in thought about?

I best start watching what it is that is going on around me, prior to indulging in food…
Or i need to switch my brain off.. Either was I am so far in my own head half of the time I don’t know what is real and apparent and what is indeed, in my head!