Collards work great as a substitute for broccoli! And it has almost the same nutrients. Nevertheless, collards are perhaps the most underappreciated vegetable out there, Collards (or collard greens) are an excellent source of phytonutrients, calcium, and Vitamins A, K and C. They also happen to be delicious and highly adaptable in the kitchen. You can chop them into a soup or stew, lightly steam them and use them as wraps in place of a tortilla, or gently saut them with garlic and chili peppers for a quick side dish.