Margarita

Run a cut lime around the outer edge of half the glass rim.

Press that half into a saucer of flaky salt, keeping the glass tilted so nothing falls inside.

Fill the glass with ice and set it aside.

Shake the tequila, lime juice, orange liqueur and agave syrup hard with ice for 12 seconds.

Taste before you strain. Limes vary enormously and the agave is there to correct for that, not as a fixed quantity.

Strain over the fresh ice in the prepared glass.

Hang the lime wheel on the unsalted side of the rim.