Damn, that is hard! Does nutritional yeast count as part of the 'nutritional needs being met' bit? I'm going to go with yes, hehe.
So, tahini would definitely be top of the list. It's so versatile and makes everything creamy and delicious. I love how you can use it in a variety of different cuisines, it's one of my favourite things. Soy sauce/tamari is something I couldn't live without, too. And I can't choose between chillies and garlic.....argh! I definitely have to have garlic in there soooo I'm going to go with these -
Chilli-infused soy sauce (Boom, I win!)
Or should I have plain soy sauce and a bottle of sriracha for the chilli/garlic combo? Eeeek.
Here is a not-very-exciting picture of some short-grain brown rice and green beans in a tahini/soy sauce dressing topped with sriracha. Looks boring, tastes amazeballs.