Okay, so it's not really a Fizz, it just get's really fizzy after you shake it. Fizzes are a particular type of drink, which this is not. I'm not sure anyone cares that much. I'm just heading off the "justsoyouknow..." comments. Haha.
First you have to make the rosemary simple syrup. WAIT! Don't go! That's usually a deal breaker for me too, but it's really not as much of a pain as I imagined.
Rosemary Simple Syrup
1 cup water
1/4 cup sugar
5 or 6 big sprigs of rosemary
Combine all over high heat until the sugar is melted. Reduce to simmer for 10 minutes. (Be like me, forget about it for 20 and it still tastes fine)
Lemon Rosemary Margarita
1-2 ounces white tequila (I prefer Herradura. You could use gin or vodka if you like instead)
1 ounce of Canton ginger liquor
2 ounces rosemary simple syrup
juice of one lemon
5-6 large ice cubes
optional - 2-3 dashes of angostura bitters (if you love bitters as much as I do and sneak them into everything)
Combine all ingredients in a shaker and shake the heck out of it! It will get really fizzy and bubbly on top. I like to use big cube-shaped ice cubes because they don't melt as fast and I like the little ice chips that break off of the corners when you shake the drink. If it's too sweet you can dial back on the simple syrup (but lose a bit of the rosemary flavor) or the ginger liquor, which is also pretty sweet.