Place the soaked and drained beans in a large pot.
Cover with water and bring to a boil.
Reduce the heat to low and simmer for about 1-1.5 hours, or until the beans are tender. Drain and set aside.
In a separate pot, bring salted water to a boil.
Add the potato chunks and cook until tender, about 15-20 minutes. Drain and set aside.
In a large mixing bowl, combine the cooked beans and potatoes.
In a small skillet, heat the lard or butter over medium heat.
Add the minced garlic and sauté until fragrant, about 1-2 minutes. Do not let the garlic burn.
Pour the garlic mixture over the beans and potatoes.
Using a potato masher or fork, mash the beans and potatoes together until well combined and smooth. The mixture should have a slightly chunky texture.
Season with salt and black pepper to taste.
Transfer the matevž to a serving dish.
Garnish with fresh chopped parsley.
Enjoy your meal!