The hamburger from Fast Foods was precisely made to offer a first juicy and delicious bite that would be impossible to enjoy if we could imagine the whole aspect of farms, butcheries and of all the workers or if we could know from the first bite that the hamburger is so delicious because of the “artificial barbeque flavors”.
The hamburger must be fast consumed; it would be a pleasure if we could imagine the green grass, the steak from an animal grown on a pasture, a pleasure based on knowledge and appreciation for the work and creatures not on ignorance and indifference.
To eat slowly means, to eat “in a free way” not because of an impulse. In many cultures, especially in those that didn’t lose the bond with the earth, there still are rituals that encouraged this was of eating, for example, there is a food blessing or an appreciation prayer before eating.
I believe that the goal of these rituals is to don’t eat in ignorance or in a hurry, and also to combine the pleasure of eating with the pleasure of thanksgiving and knowledge. I’m not used to express my appreciation before meals, but sometimes I remember Wendell Berry’s words that help me to eat free.

Probably the way to fully enjoy the food- to feel a pleasure without ignorance- is the most profound form of the bonding with the world. Trough this pleasure we are aware of our dependency and we celebrate this, because we eat in mystery from creatures that we didn’t create and from forces that are beyond our understanding.
Such words can help you to be in control of your meals, but the best would be (as Wendell Berry said) that we, the consumers should involve ourselves more in the food production, even if this means just to plant some herbs in a pot, or just to go different plants or mushrooms picking in the park.
Because of the indifference of the consumer beside the food, we have to remember how the food from our plates is tilled, grown and prepared.