large summer squash, cut in half lengthwise
3 tablespoons olive oil
1 onion, chopped
1 pound lean ground turkey
1 cup heirloom tomatoes, chopped
1/2 cup low-sodium chicken broth
2 teaspoons chopped fresh thyme
Salt and pepper
1/3 cup dry Italian-style bread crumbs
2 tablespoons grated Parmesan
Serves 4