Add garlic: Stir in the minced garlic and cook for an additional minute, making sure not to burn the garlic.
Brown the beef: Increase the heat to medium-high and add the ground beef. Cook, breaking it apart with a spatula, until browned, approximately 5-7 minutes.
Incorporate other ingredients: Stir in the diced sweet potatoes, drained black beans, canned diced tomatoes, chili powder, cumin, salt, and pepper.
Simmer: Cover the skillet and reduce the heat to medium-low. Cook for 20-25 minutes, stirring occasionally, until the sweet potatoes are tender.
Serve warm: Once everything is cooked and the sweet potatoes are fork-tender, serve the dish warm.
Notes
Ensure even cooking by cutting sweet potatoes uniformly. Adjust spice levels to preference.