I think the biggest thing is clean as you go. Wash all your knives cutting boards dishes when you are done cooking not look at a sink full of dishes after you are done. Cleaning as you go helps keep away cross contamination and you avoid having food borne bacteria.
My Mom always cooked healthy. Greek food lends itself to cooking healthy.
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It's fun to pick a cuisine and say I'm going to research Ethiopian food and see what it's all about. You find that there are a lot of similarities in cuisines from around the world and a lot of similar flavors.