Compost

All you need is organic waste. I keep a bucket in my kitchen and when I have scraps of ANY organic material (things like eggshells or bones might be harder to compost but there's plenty of other uses for them) I take it outside to the compost.

Organic material

Sunlight

Roughly 1 cubic meter of space

Patience

Dump your organic scraps in a container open to sunlight, wind, and rain and let the magic happen. It is better to add a small amount of soil or further broken down organic material to encourage the process.

If the composting material is exposed to large amounts of sunlight, it will break down faster (but will also lose moisture faster), and if big enough, will start to get hot, like 130 degrees Fahrenheit hot.

If it looks like its getting too dry, water it mildly (or pee on it); composting only happens when bacteria, fungi, and other critters consume the organic material.

These images show over 2 years of organic waste from 5 people, mostly broken down in this beautiful orange tote bucket.

The point of this is not to get "useable soil" for gardening on an efficient basis, but rather to see to it that organic waste finds its way back into the natural cycle of life, from soil back to soil.

If you keep the compost in a slightly shadier area and the temperatures do not get very hot, your compost will likely become a mega-fertile ecosystem of its own, able to harbor and sustain new life! It's an awesome feeling to throw away food scraps and have trashed seeds produce fruit to eat. Nature is amazing. In these photos there are volunteer cucurbits (not sure which) and a tomato on the side. Hopefully I get to the fruit before the birds and bunnies.