In a pot, heat the oil and cook the ground beef until browned.
Stir in the onion, garlic, carrots, potatoes, green beans, mint, and seasonings. Cook until vegetables are tender, about 12–15 minutes. Set aside.
To make the masa
In a large bowl, combine masa harina, baking powder, paprika, bouillon, and salt.
Gradually mix in water using your hands until the masa has a smooth, pliable, moist dough consistency. Adjust with extra masa harina or water if needed.
Cover with a damp towel until ready to use.