Heat the oil in a large stockpot over medium-high heat. Add the onion, garlic, and ginger and cook until they begin to brown, about 5 minutes.
Add the light coconut milk, vegetable stock, and red curry paste to the pot and stir to combine. Add the cauliflower, green beans, carrots, and chickpeas. Bring the mixture to a boil, and then reduce the heat to medium-low. Cover the pot and simmer for 15 minutes, or until the vegetables have softened.
Uncover the pot and stir in the spinach, continuing to simmer, while stirring frequently until the spinach wilts. Season with sea salt and black pepper to taste.