Most organic kitchen and garden waste can be composted in the garden by either using a traditional 'heap' or a purpose-made compost bin.
Collect up used tea bags, uncooked vegetable and fruit  peelings, coffee grounds and egg shells from the kitchen in a small tub for easy transportation to the compost bin.
Also add grass cuttings and small plant clippings, but preferably not weeds. Ensure all items are mixed regularly, as this will help speed up the composting process.
Once the materials have fully biodegraded, the end product is compost, which can be used around the garden.