I love the "nose to tail" vegetable concept behind this salad. You just have to be careful: the flavor of vegetable tops varies from batch to batch. One bunch of carrot tops can have grassy, lovely, sour flavors. One bunch of beets can have super sweet tops. Then, all that can change. You have to taste the tops and make sure they are on point. When you shop for this salad you want to know about the tops more than the vegetables they are attached to! You are also, hopefully, going to use tops that are hanging around in your fridge. If you have some "droopy" tops, refresh them by soaking in cold water for 20-30 minutes. Then, dry them and cut into the salad. You also need a neutral green, like peppery arugula, mixed in that acts as a home base for all the flavors. The walnuts are best when crushed from whole pieces and untoasted here. They add to the richness of the dressing and round out the bitter edges from the vegetable tops.