Heat a large skillet over medium-low heat and cook the onion in the ghee, butter, or coconut oil until it begins to soften, about 3 minutes.
2 tablespoon ghee, 1 onion, 1 cup full-fat coconut milk
Season to taste with sea salt and freshly ground black pepper, stir in the curry powder, and continue cooking for a minute.
Sea salt and freshly ground black pepper to taste, 2 teaspoon curry powder
Place the mixture in a blender or a food processor, and add the tomato paste as well as the chicken stock and coconut milk. Process or blend until smooth.
2 teaspoon tomato paste, ½ cup homemade chicken stock
Pour the mixture back into the skillet and bring to a simmer.
Add the shrimp and spinach and cook, covered, for about 5 minutes, until the shrimp are just cooked.
2 lbs shrimp, 2 tightly packed cups of shredded spinach