Step 1

Rub the rim of an old fashioned glass (or whatever similar vessel you prefer) with a meyer lemon slice.  Swirl the rim through a small pile of kosher or sea salt to salt the rim.

Step 2

Put the meyer lemon juice, (optional lime juice), tequila, simple syrup, and bitters in an ice filled cocktail shaker. Shake vigorously for 15 seconds.

Step 3

Put a few cubes of ice in your prepared glass.  Strain the cocktail into the glass and enjoy.