Begin by separating the Swiss chard stems from the leaves using a sharp knife. Chop the stems into pieces around ¼ inch in size and give the leaves a rough chop. Crush the garlic cloves too.
Take a non-stick pan and place it over medium heat. Add the olive oil to the pan, and then add the garlic and Swiss chard. Sauté for 2 to 3 minutes.
Now, squeeze the lemon juice over the Swiss chard and lightly season with a pinch of salt and pepper. Continue to sauté for another minute.