You can never have too many burger recipes, and this one is perfect for those wanting a lighter version. And it's also a mouthwatering option for vegetarian guests at your next barbecue. The combination of balsamic, earthy mushroom, grilled red onion, and bubbling gruyère is so decadent and satisfying — you might find your meat-eating friends noshing on these instead!

These burgers are delicious charred over a charcoal grill with a cold beer during the Summer, but also taste fabulous during cooler months when cooked on an indoor grill pan. The caramelized flavors are so rich paired with a brioche bun.