In an 8 or 10-quart soup pot with a lid, melt the butter with the olive oil over medium flame. Add the onions, carrots, celery, and fennel and cook 10 minutes or until softened, stirring often. Season with the 1/2 teaspoon each: salt and pepper; the crushed red pepper, garlic, one teaspoon of the thyme, rubbed sage, ground rosemary, and parsley. Cook another minute.