While the meatballs are cooking, in a Dutch oven, heat 2 tbsp of olive oil. Saute the diced yellow onion, cumin seeds, seven spice, and garlic. Add the cup of tomato sauce and let simmer for a few minutes. Add the meatballs, chicken broth, a pinch of salt and black pepper. If you like, add a dash of cayenne pepper too. Now would be a good time to add any leftover pine nuts…