French Onion Soup Dumplings Recipe | Tasting Table

Name: French Onion Soup Dumplings Recipe | Tasting Table
Ingredients: 1 stick unsalted butter; 2 medium shallots, thinly sliced; ½ medium yellow onion, thinly sliced; 1 cup red wine; 1 cup beef broth; 1 cup chicken broth; 2 tablespoons minced fresh thyme; 1 tablespoon balsamic vinegar, preferably aged; Kosher salt and freshly ground black pepper, to taste; 1 tablespoon extra-virgin olive oil; ¼ teaspoon minced fresh thyme; Twelve ¾-inch cubes of artisan bread; 1 garlic clove, minced; 36 square wonton wrappers; 1 egg, lightly beaten; Vegetable oil, for frying; 2 cups grated Gruyère cheese; Softened butter, for greasing