These caramelized onion roast beef rolls are a delicious and savory appetizer or main dish. Tender roast beef is rolled up with caramelized onions and melted cheese, then baked until golden and crispy. The caramelized onions add a sweet and savory flavor to the roast beef, while the melted cheese adds a creamy and gooey texture. These rolls are perfect for parties or as a hearty meal served with a side salad or roasted vegetables.