this achievement can easily be unlocked in the coastal village world. to pick it click create new world, the scroll until you see an arrow pointing right, click on that, and then pick coastal village. than launch the world.
bread can be made by crafting three pieces of wheat in a crafting table. you will need a crafting table before you can unlock this achievement. there are a few farms with at least 4 pieces of wheat in each one. grab three pieces and then open your crafting table. find the bread icon, and hit the craft button. you will unlock it shortly afterwards.