If making a salt rim, dip the edge of your cocktail glass in simple syrup (or use a lime wedge to moisten the rim)
Roll the rim of the glass in salt.
Add sour apple schnapps, tequila, lime juice and simple syrup to a cocktail shaker filled halfway with ice. Shake well for ~10 seconds.
If adding in shimmer dust, add in and shake for a few more seconds. Strain into salt-rimmed cocktail glass and enjoy.