flyboy, I start cutting the outer leaves when they are about 12 inches long. I like to add them to my chicken soup. I also saute them in alittle olive oil, garlic, alittle chicken broth and alittle balsamic vinegar. I usually have this as a side dish to fish, along with sweet potatoes fries.
I harvest mine when the leaves are large enough about 12 inches. I have swiss chard that came back up from last year, had to harvest those before they went to seed. I even have volunteers that are sprouting everwhere. I like to sauteed it simply with olive oil and garlic.
Remember, you don't need to cut down the entire plant. Just remove a few leaves from each, and the plant will keep growing. Even the very large leaves are still wonderful. Happy Gardening!
Excellent! Glad you enjoyed it. How did you end up preparing it? Since it grows like crazy, I like to harvest the extra- blanch it for a few minutes and freeze it. Come winter, I can add it to soups and pasta. It is a great way to get a serving of green veggies. When added to something like pasta, you can barely tell it is there- but you get all that nutrition. Happy Gardening!
Also keep in mind that if you've got any recipes that call for Spinach, you can substitute chard 1 for 1 in place of the spinach.. The taste when cooked (IMHO) is very similar.
best recipe I have is saute in olive oil with onions,garlic, & tomatoes, it will be soupy and then serve it over day old Italian bread top with parm cheese... yummo