Make the Refried Beans: Heat vegetable oil in a large skillet over medium heat.
Add the drained and rinsed black beans. As they cook, stir and mash them with the back of a spoon or a potato masher to create a chunky, refried texture.
Stir in the salsa, dried oregano, ground cumin, and ancho chili powder.
Continue cooking and mashing for about 5 minutes until heated through and fragrant.
Set aside.
Pan-Fry the Plantains: While the beans cook, prepare the plantain.
Peel and slice it in half lengthwise, then cut each half into quarters. Lightly coat a nonstick skillet with cooking spray and heat over medium-high heat. Pan-fry the plantain pieces for 2-3 minutes per side, until beautifully browned and caramelized.
Assemble the Burritos: Remove the plantains from the skillet and warm the tortillas in the same pan for about 30 seconds per side until soft and pliable. Lay a warm tortilla on a plate. Spoon half of the bean mixture onto one side, top with 2 pieces of fried plantain, and sprinkle with 2 tablespoons (30 ml / 1 fl oz) of queso fresco and fresh cilantro.
Fold into a burrito and repeat with the remaining .
Serve immediately.