Beefeater Martini

I believe there may be a slight confusion with the name of the dish you're inquiring about. There is no food or drink called a "beefeater martini" found in restaurants in the USA. However, there is a famous gin called Beefeater, which is often used in making martinis.

A classic martini is a cocktail made with gin and vermouth, and is typically garnished with an olive or a lemon twist. The Beefeater gin is a popular choice due to its distinctive flavor profile.

Here is the recipe for a classic Beefeater martini:

Ingredients:

- 2 1/2 ounces Beefeater gin

- 1/2 ounce dry vermouth

- Green olive or lemon twist, for garnish

Instructions:

1. Fill a mixing glass with ice.

2. Add the gin and vermouth.

3. Stir until well-chilled.

4. Strain into a chilled martini glass.

5. Garnish with an olive or lemon twist.

Please note, that the recipe can be adjusted to personal preference, such as using more or less vermouth or adding a dash of bitters. Enjoy responsibly!