French onion sausage rolls

French onion sausage rolls are a flavorful and savory twist on the classic sausage roll, incorporating the delicious taste of French onion soup. Here’s a simple recipe for you to try:

Ingredients:

For the Filling:

• 1 tablespoon olive oil
• 1 large onion, thinly sliced
• 1 tablespoon unsalted butter
• 1 teaspoon sugar
• 1 teaspoon balsamic vinegar
• 1 pound (about 450g) ground sausage (pork, beef, or a mixture)
• Salt and pepper to taste
• 1 teaspoon dried thyme
• 1 sheet puff pastry, thawed if frozen
• 1 cup shredded Gruyere or Swiss cheese

For the Egg Wash:

• 1 egg, beaten
• 1 tablespoon water

Instructions: