Tomato Salad with Corn, Summer Squash and Roasted Onions

INGREDIENTS

• Salt
• 10 large basil leaves
• 1 yellow summer squash
• 2 medium onions (use new onions if you can find them)
• 1 scallion, finely chopped (or use fresh green onion tops if you have them)
• 1 teaspoon honey
• Coarsely ground black pepper
• 2 cups Sungold tomatoes (or other small, sweet tomatoes)
• 2 teaspoons sherry vinegar
• 2 small ears corn, blanched
• 5 tablespoons olive oil, divided