Arugula is a suitable substitute for broccoli rabe in salads. Arugula is much more delicate than broccoli rabe so it wouldn’t work as a replacement in cooked dishes. Both greens have a bitter and peppery flavor.
5.Collard greens are a great substitute for broccoli rabe. They have a similar taste but lack the florets that broccoli rabe has. They have big thick leaves with tough large stems. The stems are often removed before the collards are cooked.