The following are seasonal favourites for January and February.
I find seeds are very hard to have success with at this time of the year due to the extreme heat we often see. If you are putting seedlings in make sure they are as advanced and as healthy as possible. Using a root mycorrhizal Inoculant will help with transplant shock. Always cover your vegetable garden, and if possible only put the cover on when its 32 degrees or more. This will build up a heat resistance in your plants.
Vegetables:
Beans
Beetroot
Carrot
Capsicum
Chilli
Chinese Cabbage
Cucumber
Gherkins
Melons
Parsnip
Pumpkin
Radish
Silverbeet
Spring Onion
Sweet Potato
Squash
Sweet Corn
Tomato
Zucchini
Edible Weeds In Season:
Amaranth
Purslane
Fat Hen
Wild Rocket
Sour Thistle
Dandelion