Kosher salt. 2 lemons, quartered 1 large yellow onion, sliced. Good olive oil. Storage: Croutons will keep in an airtight container for a couple days at room temperature. Add the onions and cook over medium-low heat for 15 minutes, stirring … Note: Recommended bread for croutons are any of the crusty loaf varieties, like sourdough, ciabatta, boule, etc. Freshly ground black pepper. More recently, the host of Food Network’s Barefoot Contessa took to Instagram to give us a helpful tip on how to take stale or leftover bread and easily turn it into homemade croutons. Make sure the croutons are completely cool before storing. Barefoot Contessa; croutons; Dash Magazine November 2014; Homemade Croutons; Ina Garten; Make It Ahead; recipes; Thanksgiving; Directions. Deselect All. Feb 2, 2019 - The Barefoot Contessa shares an easy way to make perfectly toasted croutons. In a large pot or Dutch oven such as Le Creuset, heat the olive oil over medium heat. 1 (4 to 5-pound) roasting chicken.