That is so amazing - yes that is the one, the can be distinguished by their red stem, there are many varieties of this plant, but the one you have planted there is the one you want. Do yourself a flavor and taste one of the leaves, you will also note that their taste may vary from morning to night slightly due to the stages of its duel photosynthesizes processes it endures.
Also as the seasons change.
and if you would like to propagate more of them all you need to do is break off a twig from the mother plant and push that into the ground after a month the new plant will be fully rooted and ready to plant out