Run a lime wedge around the edges of 2 glasses and dip into coarse salt (if you want salted rims). Fill with crushed ice and set aside.

In a pitcher, stir together tequila, orange liqueur, lime juice, orange juice, and liquid stevia. Divide into the prepared glasses. In the center of each glass, add a few drops of grenadine syrup and allow to settle on the bottom. Top with lime wedge and cherry, if desired.