Coconut Milk Cauliflower Soup with Red Curry

Name: Coconut Milk Cauliflower Soup with Red Curry
Ingredients: 1 large (2lb) head of cauliflower, cut into small florets; ¼ cup melted coconut oil or olive oil, divided; 1 teaspoon sea salt, divided; 1 large sweet onion, diced; 1 bunch scallions, white and green parts separated, thinly sliced; 2 cloves garlic, minced; 1-2 tablespoons red or panang curry paste; 1 small (1/2lb) russet potato, peeled and diced; 1 quart vegetable stock; One 14-ounce can coconut milk; 2 tablespoons fresh lime or lemon juice (from 1 lime)