My Mom always cooked healthy. Greek food lends itself to cooking healthy.
I use a lot of fresh citrus, garlic, and fresh herbs when cooking to cut down on fat and sodium but punch up flavor. Our cupboards and fridge are full of condiments - mustards, vinegars, etc. that also add tons of flavor but are low in fat, calories, or other processed additives.
I like to abide by the seasons and let the natural flavor in food speak for itself. I use quick cooking techniques of high heat with very little fat, such as quick saute or wok stir-frying.