In a large bowl, mash the cooked beans with a fork or potato masher.
Add the cooked rice to the beans and mix well.
Heat the vegetable oil in a large skillet over medium heat.
Add the finely chopped onion and cook until softened, about 5 minutes.
Stir in the minced garlic and cook for another minute.
Add the aji amarillo paste, ground cumin, paprika, salt, and black pepper. Cook for 2-3 minutes until fragrant.
Add the rice and bean mixture to the skillet, stirring well to combine with the onion and spice mixture.
Press the mixture down into an even layer and cook for about 5-7 minutes, or until the bottom is crispy and golden brown.
Carefully flip the mixture over in sections or in one large piece if possible. Cook the other side until crispy and golden brown as well.
Garnish with chopped fresh cilantro.
Enjoy your meal!