In a large, deep pan over medium heat, add the olive oil. Once hot, add the garlic. Then add in the ground beef, breaking it up with a wooden spoon. Cook the beef until no longer pink, about 8 minutes.
Add salt, pepper, cumin, paprika, and oregano to the beef.
Add water, tomato sauce, and potatoes. Stir well. Continue to cook over medium heat, simmering. Simmer for 20 minutes until the potatoes are tender.
Remove the dish from heat. Add olives and cilantro as garnish and serve.