Drain and rinse the soaked beans. In a large pot, cover the beans with water and cook until tender, about 30-45 minutes. Drain and set aside.
Rinse the brown rice under cold water. Set aside.
If using dried waakye leaves, rinse them and soak in warm water for about 10-15 minutes to soften. If using banana leaves, rinse and cut into large pieces.
In a large pot, bring 6-8 cups of water to a boil.
Add the soaked beans and bring to a simmer. Add the chopped onion, minced garlic, ground black pepper, and salt. Let it cook for about 10 minutes.
Add the rinsed brown rice and mix well. Place the softened waakye leaves or banana leaves on top of the mixture. Cover the pot with a lid and cook on low heat for about 30-40 minutes, or until the rice and beans are fully cooked and tender.
Remove the leaves and gently stir the mixture to combine.
Enjoy your meal!