In a Dutch oven or skillet, cook the ground beef over medium heat until fully browned.
Drain off the excess fat.
Transfer the cooked ground beef to the slow cooker.
Add the potatoes, sliced carrots, chopped onion, and minced garlic to the slow cooker.
In a small bowl, combine the dried oregano, onion powder, salt, and pepper.
In a separate bowl, whisk together the tomato paste and water until smooth.
Add the dried seasoning mixture to the tomato paste mixture.
Stir until fully combined.
Pour the tomato mixture over the ground beef and vegetables in the slow cooker.
Gently stir to distribute the sauce evenly.
Cover the slow cooker with the lid.
Cook on low for 7 hours, or until the potatoes and carrots are tender.
Taste and adjust seasoning with additional salt and pepper, if needed.
Serve hot with buttered sandwich bread, dinner rolls, cornbread, or crusty bread.