Heat olive oil in a large pot over medium heat.

Sauté onion until translucent, about 5-7 minutes.

Add garlic and cook for 1 minute, stirring constantly.

Combine sweet potatoes, broth, salt, pepper, cumin, and red pepper flakes.

Bring to a boil, then reduce heat and simmer until sweet potatoes are tender, around 15-20 minutes.

Stir in kale and cook for an additional 5 minutes.

Blend for a smoother texture if desired.

Serve hot in your favorite bowls.