This is your new favorite vegetable burger: meaty, juicy, and with a touch of heat. Ingredients To prepare burgers: 1 ⅓ cups mashed drained and rinsed canned black beans 2 cloves of garlic ¼  cup chopped mushrooms 2 tablespoons olive oil or vegetable oil ¾ teaspoon salt, plus more to taste 3 ½  teaspoons ground … Continue reading Black beans-spiced barbecue burgers with caramelized onions