Chard with Lemon, Garlic & Onions

Heat oil in a large skillet over medium heat. Cook the garlic and onions, stirring occasionally, until golden brown (about 2 minutes). Add red pepper flakes and half of the chard, season with salt and pepper, and cook, tossing often, until wilted, about 4 minutes. Add the lemon juice and remaining chard and cook, tossing, just until all chard is wilted, about 1 minute; season with salt and pepper.