In the same skillet, over medium heat, add the remaining 2 tablespoons olive oil and the chopped shallots. Sauté 5 minutes. Fold in remaining cumin, coriander, and red pepper flakes and cook one minute. Then, start adding the greens, allowing each batch to cook down before adding more. When all the greens have been added, sprinkle with 1/4 teaspoon sea salt and stir in the broth. Set heat to medium-low, enough for a lively simmer, and cook greens 20 minutes. Fold in coconut milk and simmer 5 minutes more. Taste and add sea salt as needed.