Add the remaining coconut oil to the pot. Stir in the onions, peppers, more salt and pepper and stir to toss. Cover and cook until the vegetables have slightly softened, about 5 minutes. Add in the garlic, ginger and curry paste and stir to coat. Cook for 5 minutes, stirring occasionally, scraping the bottom. Add in the snap peas and coconut milk. Increase heat and bring the mixture to a boil, then reduce the heat to low, cover and cook for 5 minutes. Stir in the shrimp and cilantro and cook for 5 minutes more.