To make the vinaigrette. Combine all ingredients in a glass jar. Taste and season with salt, pepper, and chili flakes. To make the salad. Mix all ingredients in a large salad bowl. When ready to serve, pour over the vinaigrette, tossing well to coat the entire salad. Top with bread crumbs and fresh herbs. To make the breadcrumbs. Preheat the oven to 400° F. Line a baking sheet with parchment paper. Arrange the butter, bread, and prosciutto on a baking sheet. Bake 10-15 minutes until the bread is toasted and the prosciutto is crispy. Add everything to a food processor. Season with salt. Pulse into fine crumbs. Alternatively, you can crumble the mix with your hands.