Heat the coconut oil in a large stock pot (I use my Dutch Oven) over medium-high heat. Add the yellow onion and sauté, stirring occasionally, until translucent, about 8 minutes. Add the garlic, ginger, cauliflower, curry powder, sea salt, and red pepper flakes. Cook, stirring occasionally, until very fragrant, about 5 minutes. Add the peppers and carrots, cover, and continue cooking, stirring occasionally, until vegetables have softened but are still slightly al dente, about 5 to 8 minutes.