Stock (food)
A stock is made by simmering  animal bones and/or meat, fish, or vegetables in water and/or wine. mirepoix or other aromatics are added for more flavour. Mirepoix is a mixture of onions, carrots, celery, and sometimes other vegetables. Many use ready-made ingredients like Oxo cubes or bouillon cubes. It is possible to make stock more quickly with a pressure cooker.