Wheat Berry Salad with Butternut Squash and Peppers

Name: Wheat Berry Salad with Butternut Squash and Peppers
Ingredients: 1 cup hard winter wheat berries; Kosher saltand freshly ground black pepper; 1 medium butternut squash, peeled, seeded and cut into 3/4-inch cubes (about 2 cups); 1 red onion, peeled and quartered; 1/2 red bell pepper, stemmed, seeded and quartered; 1/2 yellow bell pepper, stemmed, seeded and quartered; 1/2 green pepper, such as Anaheim or poblano, stemmed, seeded and quartered; 6 tablespoons extra-virgin olive oil, plus more for drizzling; 1/4 cup peeled cloves garlic; 2 tablespoons red wine vinegar; 2 teaspoons Dijon mustard; 1/4 cup dried currants; 2 tablespoons fresh basil chiffonade