Planning for some veggie-lovin’ party guests this summer? This portobello mushroom burger featured on How Sweet It Is is sure to leave everyone feeling completely satisfied and begging for your grilling secrets. Though this burger might be meat-free, it packs plenty of flavorful goodness to go around, with roasted garlic, creamy avocado, thick slabs of creamy gouda, portobello mushroom caps marinated in syrupy balsamic and more — sounds heavenly, we know!