Endive/ˈendaɪv/ Definition 1 of 3Pro Tip 1/3Salad Bitterness Endive adds a unique bitterness to salads, distinguishing it from sweeter greens. She tossed her salad with endive for a bitter twist. Pro Tip 2/3Cooking Versatility Endive can be cooked or served raw, making it versatile in kitchen use. We sautéed endive as a spinach substitute. Pro Tip 3/3Unique Flavor Endive's slightly bitter taste may be unexpected, so use it sparingly initially. Add a few leaves of endive to taste its unique flavor.