In my kitchen I consider it a crisis if I don't have lemons or lemon juice, garlic bulbs and at least two kinds of vinegar. I always am cooking with these three things. Other spices, oils, herbs, extracts, have there place but lemon, garlic and vinegar are essential. I also cook with a lot of rice. If I have rice, then I can make something, hence why I bought the biggest bag of rice they sell at the supermarket. I also (shock! Horror!) use canned beans and tomatoes. And when I can I buy a dried chorizo from a local butcher shop to make my rice and beans more tasty. So what's indispensable in your kitchen?