The Truffled Burger Queen
[Vegan]

For the Patties:

• Olive oil, for frying
• 1 yellow onion, finely sliced
• 1 green bell pepper, diced small
• 2 cloves garlic, crushed
• 3/4 cup (100 g) roasted cashews, chopped
• 1/2 cup (100 g) cooked and drained green lentils
• 1/2 cup plus 3 tablespoons (150 g) drained and rinsed canned black beans, mashed with a fork
• 1 cup (100 g) grated vegan Parmesan cheese
• 2 cups (100 g) panko or gluten-free bread crumbs
• 1 tablespoon (15 g) chili sauce
• 1 teaspoon balsamic vinegar
• 3/4 teaspoon salt, plus more to taste
• 1/4 teaspoon pepper
• 1 teaspoon agave syrup
• 4 buns, halved and lightly toasted

For Truffle Mayo:

• 1 scant cup (200 g) vegan mayonnaise (page 152)
• 1 tablespoon (15 ml) truffle oil, or more to taste
• Salt and freshly ground black pepper, to taste
• A few drops of fresh lemon juice

For Toppings:

• Sweet potato slices
• pickled onion
• Fresh green leaves or herbs
• Fresh cherry tomatoes