Preheat oven to 375°F (190°C). Combine Knorr® Cream of Mushroom Dry Soup Mix, milk, goat cheese, eggs and thyme in medium bowl. Stir well, and season, if desired, with salt and black pepper. Let mixture stand for 10 minutes.
Arrange tart shells on baking sheet. Spoon soup mixture into shells. Bake 15 minutes or until centers are set. Remove and serve immediately.