First, press the tofu: Lay out a clean kitchen towel, wrap up tofu in it and put a heavy book on top for 30 minutes.*
Next, combine lemon juice, oregano, and salt in a shallow container and mix well.
Once the tofu is done being pressed, slice it into cube-sized pieces and add to the container with marinade. Then close the container with a lid, shake it up and let it sit for at least an hour. The longer, the better.
Serve over greek salad or any salad of choice.
* This step is key to press out excess water so the tofu absorbs the maximum amount of the marinade.