1. Walnuts: Heat oven to 350°. Toast walnuts on a baking sheet for 10 minutes, tossing once. Let them cool and coarsely chop.
2. Raisins: In a small saucepan over low heat, simmer white wine vinegar, water and raisins for 5 minutes, until plump and soft. Set aside in the liquid.
3. Breadcrumbs: Toast bread crumbs, garlic and 2 teaspoons of the olive oil in a skillet together with a pinch of salt until golden. Set aside.
4. Kale: Trim heavy stems off kale and remove ribs with a knife. Stack sections of leaves and roll them into a tube, then cut them into very thin ribbons crosswise.
5. Salad: Put kale in a large bowl. Add pecorino, walnuts and raisins (with leftover vinegar mixture in dish), remaining 4 tablespoons olive oil and lemon juice and toss until all the kale ribbons are coated. Taste and adjust seasonings with Kosher salt and pepper, and add breadcrumbs. Let sit for 15 minutes+ before serving.