Heat the olive oil in a large, high-sided skillet over medium heat. Add onion, garlic, carrots, and bell pepper. Season with salt and black pepper, to taste, and cook, stirring frequently, until vegetables become soft and translucent, approximately 5 minutes.
Add vegetable broth, grated gingerginger, lemongrass, ccoriander and thyme leaves and stir to combine. Cover and cook until the carrots are fork-tender, approximately 10-15 minutes. Stir once or twice while cooking.
Remove from heat and puree mixture with an immersion blender until smooth. (A regular blender or food processor can also be used for this step). Taste and adjust seasonings, as desired.
Return to medium heat and add coconut milk. Stir until barely combined and cook until heated through approximately 1-2 minutes. Remove from heat and serve reight away.