M0nica
Norah I have always seen food as something to be enjoyed and savoured, something which is so important to life that i want to know where it comes from, how it is prepared and its evolution as well as the best combination of foods for health, mental and physical.
Food is multisensory, and can only be given the respect its essential nature to our lives requires by our being willing to devote time and effort to its selection and preparation.
Sustenance, to me, means eating without discrimination, like putting petrol in a car,
I assumed I wasn't understanding. 
I spend time preparing food, growing herbs and veg. Hours daily selecting the recipes, measuring ingredients, herbs and spices - and cooking.
Eating food, to me is merely means to an end - healthy body.