Indulgent Shallot Tart

Name: Indulgent Shallot Tart
Ingredients: 1 1/2 pounds banana shallots, peeled and cut into quarters; 2 tablespoons extra-virgin olive oil, divided; 1 tablespoon balsamic vinegar; 3 tablespoons fresh thyme leaves, 1 tablespoon chopped and 2 tablespoons leaves left whole to serve; 1/2 teaspoon flaky sea salt; 3/4 cup unsweetened almond milk; 1 tablespoon cornstarch; 1 scant tablespoon vegetable bouillon powder; 1 tablespoon whole-grain mustard; 1/4 cup dry white wine, such as Sauvignon Blanc; 14 to 17 ounces frozen puff pastry, thawed; 3/4 cup pre-cooked dark Puy lentils