Grab the ice and toss it into the highball glass. The glass should be filled up to the top.
Take the jigger and measure out 1 oz of grenadine. Toss the grenadine directly into the bottom of the glass.pro tip: if you don't have a jigger, you can add 2 tbs of grenadine instead.
Take the jigger and measure out 5 - 6 oz of ginger ale. Toss the ginger ale directly into the glass.Pro tip: if you don't have a jigger, you can simply pour the ginger ale straight into the glass and skip any measuring. Or, if you do want to measure, you can add ¾ cups instead of using ounces.
Toss a maraschino cherry on top if you want to add the garnish.
If you like you drink stirred, you can use a bar spoon. Stick it into the glass and give it a few good stirs.
Notes
If you don't have a jigger to measure with ounces, you can use the following:2 Tbs of grenadine¾ cup of Ginger Ale