Cut vegetables, either by hand or with a food processor using the blade and grating attachments. Heat olive oil in a large skillet or wok over medium-high heat. Add onion and salt and cook until translucent, about 10 minutes. Stir in curry powder, chili and bell peppers, garlic, and ½ of the ginger. Stir for 2 minutes then add carrots and a pinch of salt. Stir in tomatoes with juices, 1 cup water, and tomato paste. Lower heat to medium and cook for 15 minutes to reduce. Remove from heat and mix in thyme, and remaining ginger. Season with salt and pepper to taste. Pour in a serving bowl to pass between diners.