Grilled Polenta Recipe With Spring Beans

Name: Grilled Polenta Recipe With Spring Beans
Ingredients: 5 1⁄2 cups water; 1 tablespoon salt; 1 cup medium-grain polenta; 2 tablespoons olive oil, plus more; 8 tablespoons olive oil, divided; 1⁄4 cup finely diced onion; 2 teaspoons minced garlic; 2 teaspoons thyme leaves; 3 cups fresh shell beans (at least 2 types such as flagolets, black beans, black-eyed peas, limas, or cranberry beans); Kosher salt to taste; 1⁄2 pound haricots verts or thin string beans; 2 tablespoons finely diced shallot; 2 tablespoons sliced opal basil; 2 tablespoons chopped flat-leaf parsley; Olive oil; 1 cup halved cherry tomatoes; Kosher salt and pepper to taste; 2 tablespoons diced shallot; 3 tablespoons sliced black olives; 1⁄2 lemon, for juicing; 1 tablespoon parsley; 2 tablespoons sliced basil, both green and purple (if possible)