Wash the tomatoes and cut them into large cubes, bring to the boil in a large saucepan, stirring constantly, and simmer for 40 minutes.
Filter the cooked tomato paste through a cheesecloth, season the juice with the salt and distribute it on bottles or glasses, add the oregano to the tomato juice and close the glasses. Boil at 85 ° C for 35 minutes.
The juice is suitable as a drink seasoned with pepper and salt, but you can also use it to deglaze meat dishes after searing or use it as the basis for a tomato soup.