Sure, you can eat it, but it'll tarnish the silver. Use stainless steel.
Silver
EPNS stands for Electro Plated Nickel Silver - another term for silver plate.
Nothing its plated
To clean silver plated items, gently wipe them with a soft cloth dampened with warm water and mild dish soap. Avoid abrasive cleaners or polishing compounds, as they can damage the silver plating. For tougher stains, you can use a silver polishing cloth specifically designed for silver-plated items.
Beresford plate as far as I can ascertain: john Septimus Beresford 1876..1890 your dish is silver plated rather than silver.
Silver plated? Not worth your time to extract. Plating puts such a small coating of silver on the object that the costs to extract it are more than any gains from the silver you are extracting.
There is a seven-inch International Silver Company silver-plated candy dish that appears to match the description of your item (see discussion page) listed on eBay today [December 12, 2000] at a buy-it-now price of $9.95. Comparable dishes sell for $1.00 - $12.00. Silver-plated objects typically have little value as antiques because the silver content is extremely low.
Sheridan silver is copper plated with silver.
Mine is Silver Plated.
Not all Sheridan silver is silver-plated; it is a brand known for both silver-plated and sterling silver items. Sheridan silver-plated pieces are typically made of a base metal coated with a thin layer of silver, while sterling silver items contain 92.5% pure silver. To determine if a specific piece is silver-plated or sterling, check for markings or stamps that indicate its composition.
First of all, theres no such thing as "silver plated sterling". Sterling is 92.5% silver, anything plated is just plated. If the item is solid sterling silver, its metal value depends on the current price of silver - but it may be worth more as a collectible. If it's plated base metal it has very little value.
Yes silver plated cables are actually recommended more over the gold plated ones. A lot of people say that the gold plated ones are a waste of money since you can get the same result or better from the silver plated.