""This is the ultimate not-your-average veggie burger recipe that I just can’t get enough of! The patty is made from perfectly spiced black beans with slow cooked caramelized onions inside to add sweetness and moisture.""
To make the Black Bean Patties: In a large nonstick skillet, heat 2 tablespoons oil over medium heat. Add onions and let cook until tender and slightly caramelized, about 20 minutes. Transfer onions to a large bowl. Reserve skillet for later use.
Add beans, carrots, cornmeal, breadcrumbs, chili powder, salt, cilantro, and water to the bowl of onions. Use a large spoon or your hands to mash it all together. If the mixture is too dry to hold together, add more water, 1 tablespoon at a time.
Using your hands, form the bean mixture into patties, to match the size of your slider buns. In the reserved nonstick skillet, heat remaining 2 tablespoons oil over medium-high heat, and pan-fry patties about 3 minutes on each side, until lightly browned and crisp. Add more oil to the skillet as needed. Drain patties on paper towels.
To make the Spicy Mango Sauce: Combine all ingredients in a blender and blend until smooth.
To make the Guacamole: In a large bowl, mash together avocado and lime juice, then fold in salsa fresca. Season with salt and pepper to taste.
To assemble the Sliders: Slice each bun in half and layer a couple teaspoons of Spicy Mango Sauce, 1 Black Bean Patty, and about a tablespoon of Guacamole. If you have extra Spicy Mango Sauce, you can use it as a dip for your fries!