Variations; parsley, bacon, thyme, rosemary, tarragon, sherry, beer mustard, dijon, red or white wine, vegetable stock, chicken stock, avocado, shallots, red onion, pearl onions, poblano, serrano, habanero puree, liquid smoke, soy sauce, vinegar, arugula, asparagus, cabbage, cauliflower, green beans, broccoli, capers, chives, celery, celery root, fennel, leeks, cilantro, cumin, creme fraiche, spinach, mushrooms, marjoram, olive oil, grapeseed oil, white pepper, potatoes, sweet potatoes, radish,