Heat 3 tablespoons olive oil in a large soup pot.
Add diced onion, carrots, celery, and garlic and cook until softened but not browned (about 7-10 minutes).
Add in the entire can of fire-roasted tomatoes, a heavy pinch of sea salt and pepper, cumin, turmeric, oregano, curry, chili flakes, and thyme. Stir.
Add broth and water; bring to a simmer.
Add rinsed lentils. Cover and cook for 15 minutes.
At 15 minutes, add diced sweet potatoes.
Cover and cook for 25-30 minutes, until lentils and potato are tender. Add your collard greens the last 5-10 minutes of cooking.
Taste and adjust your seasoning and salt and pepper.
Serve in bowls topped with avocado, fresh squeezed lime, and a drizzle of olive oil.
