Warm Bread Salad

Name: Warm Bread Salad
Cuisine: European
Ingredients: 1 tablespoon dried currants; 1 tablespoon red wine vinegar; 2 tablespoons pine nuts; 8 to 10 ounces slightly stale ciabatta or other open-textured white bread. (you need 5 cups of croutons); 8 tablespoons extra virgin olive oil; 1 ½ tablespoons Champagne vinegar or white wine vinegar, approximately; Salt and coarsely ground black pepper; 3 garlic cloves, slivered; ¼ cup thinly sliced scallions; 4 tablespoons lightly salted chicken stock or lightly salted water; 4 cups arugula leaves or mustard greens, rinsed and dried