You can access your own pocket dimension

You can create doorways up to 4 by 4 meters to enter it. You can bring whatever and whoever you want in it.

Whatever you build or bring in it will stay. The landscape is basically a sunny Greenfield with rivers and trees, no predators. You obviously can grow your vegetables in it.

This dimension is in synch with ours but the distances are reduced by 8 (same as the nether in Minecraft). If the door you create to come back gets into a wall, it'll pop in the nearest safe location.