French Savory Sweet Potato Soufflé

Everyone seems to worry about making a souffle, but they are not as difficult as you would imagine. This savory-sweet potato soufflé recipe is a lovely choice for a delicious, elegant side dish and so easy to make. Seasoned with thyme, onions, and garlic, as well as a generous handful of Gruyere, this soufflé is an unexpected twist on traditional, sugared sweet potato recipes.

Ingredients:

• 1 1/2 tablespoons plus 2 tablespoons softened butter, divided
• 3 tablespoons grated Parmesan cheese
• ½ cup finely chopped white onion
• 1 clove garlic, finely chopped
• 1 cup sweet potato puree
• 1 tablespoon all-purpose flour
• ½ teaspoon salt
• 1/2 cup whole milk
• ½ teaspoon dried thyme
• 1/8 teaspoon ground black pepper
• ¾ cup shredded Gruyere cheese
• 3 eggs, separated