Place vegetables into a large skillet or soup pot, and add enough water to cover them completely. Bring to a boil, and cook until vegetables are softened, about 10-15 minutes.
Transfer the softened vegetables to a food processor or blender. Add the chili pepper and parsley. Reserve the cooking liquid. Process the vegetables, chili pepper, and parsley until smooth, and then add the mixture back to the pan with the water.
Season with salt and pepper to taste. Bring the mixture back to a boil, reduce heat and simmer for 10 minutes. Serve hot.
You can adjust the water in this recipe to get your desired consistency.