Oyster sauce salt, should be added to the sauce, since the oysters should provide all the savoury flavour. However, this method is prohibitively expensive. Many modern oyster sauces are thickened with cornstarch, flavoured with oyster essence or extract and darkened with caramel. Vegetarian oyster sauce prepared from mushrooms, often oyster mushrooms or shiitake mushrooms, is also popular and generally lower in price. It may contain more taste enhancers if less mushroom extract is used to reduce costs. Most of the oyster sauces available on the market contain added monosodium glutamate (MSG). In recent years MSG-free varieties can also be found. The taste
Portobello Library, Edinburgh Western (Dundee Street) Library (1897). In 1997, Portobello Library celebrated its centenary through a programme of talks. In June 2017, the Edinburgh Tool Library opened a lending service out of Portobello Library. Portobello Library is one of the main venues for events at Portobello's annual book festival in October. Portobello Library, Edinburgh Portobello Library is a public library in Portobello, Edinburgh. The current building in Rosefield Place cost £37,500 and was opened on 11 October 1963 by Lord Provost Duncan M. Weatherstone with a stock of 26,000 books and eight staff. The previous accommodation in the former Portobello Town Hall