Gremolata is one of those toppings that enhances nearly anything it touches. The standard combination is parsley, lemon, and garlic, but in this walnut-based rendition, a dash of mint brings a bold freshness to play off the earthy nut. It’s a great topping for roasted vegetables, grilled chicken, or slow-roasted salmon. Stir it into hot noodles to create an elegant pasta, or smear it on toasted bread for a simple snack. It’s also at home on a baked potato or perfectly seared steak. The point is: whatever the gremolata adorns will taste better, which is why it is likely to become a new kitchen staple.