Grilled Seafood Salad

Name: Grilled Seafood Salad
Ingredients: 12 large shrimp, peeled; 1/2 pound sea scallops, hard tendon removed; 1/2 pound swordfish, skinless, in 1 1/2-inch chunks; 2 small to medium calamari, cleaned; 6 tablespoons extra-virgin olive oil; 3 tablespoons sherry vinegar; Salt and ground black pepper; 1 small head radicchio, quartered; 2 slices sourdough bread from the center of a round loaf; 3 scallions, trimmed and chopped; 1 tablespoon capers in vinegar, drained; 1 clove garlic, peeled; 1 tablespoon minced flat-leaf parsley leaves