Heat oil in a large skillet over medium heat
Add chopped onion and cook until softened
Add minced garlic and cook briefly
Add ground beef and cook until browned
Drain excess fat if needed
Stir in tomato sauce
Add diced potatoes, olives, raisins, and chopped bell pepper if desired
Season with salt, pepper, cumin, oregano, and paprika
Add a splash of water or broth if the mixture is too thick
Simmer until potatoes are tender and flavors are combined
Taste and adjust seasoning
Serve hot with rice, tortillas, or plantains