Add water/stock, farro, and tomatoes. Bring to a boil. Cook for 40 minutes, or until squash is soft and farro is plump. If using beans, add them after 20 minutes.
Squash some of the tomatoes with the back of a spoon. Optionally, you can smash some of the pieces of squash (using a fork) to add thickness and sweetness to the broth. Season with salt to taste and enjoy.