Calamari Salad

INGREDIENTS

• 1/2 teaspoon salt
• 1 tablespoon red-wine vinegar
• 1 1/2 lb cleaned squid
• 1 small red onion, halved lengthwise, then thinly sliced crosswise (1 cup)
• 2 tablespoons fresh lemon juice
• 2 celery ribs, cut into 1/4-inch-thick slices
• 1/4 teaspoon black pepper
• 2 cups cherry or grape tomatoes (3/4 lb), halved or quartered if large
• 1 cup loosely packed fresh flat-leaf parsley leaves
• 1/3 cup extra-virgin olive oil
• 1/3 cup pitted Kalamata olives, halved lengthwise
• 1 large garlic clove, minced