Ratatouille with Shrimp and Okra

Name: Ratatouille with Shrimp and Okra
Ingredients: 3 tablespoons olive oil; 1 medium-size sweet yellow onion, diced (1 cup); 1 green bell pepper, diced (1 cup); 2 cloves garlic, minced; 3/4 pound eggplant, cut into large chunks; 3/4 pound zucchini, cut into large chunks; 3/4 pound yellow squash, cut into large chunks; Kosher salt and freshly ground black pepper; 2 sprigs fresh thyme; 1 pint red cherry tomatoes; 1 bay leaf; 1 pound medium shrimp, peeled and deveined; 3/4 pound okra, cut into 1-inch-thick slices; Juice of 1/2 lemon (about 2 tablespoons); 1/4 cup packed chopped fresh basil leaves, plus more for garnish, optional