Last summer, I used to walk to a Whole Foods that was a mile away from my apartment. I quickly learned that schlepping beverages was a bad idea. Juice in a glass bottle was just too heavy. I looked at the bottle of lemonade on my second visit and saw that ingredients were only water, lemon juice, and sugar. I picked up a bottle of lemon juice and went home to experiment. It didn't take me long to have a very reasonable simulacrum using tap water. Fast forward to a few weeks ago when I found myself at the Trader Joe's again buying a ginger lemonade. Brought it home and thought: I can do this! And so I did. After a couple of trials, here's the best way to make your own.
1 cup lemon juice
1 cup sugar
1 cup water
3-4 thumbs of ginger
Peel the ginger and cut it into slices. Put the ginger, water, and sugar over heat to dissolve the sugar (and make yourself a gingery simple syrup). Pour lemon juice into a 64 oz container. Pour syrup in. Make sure all those ginger bits get inside too. You need those to keep steeping. Fill the rest of the bottle with water. Put in the fridge to cool. Too make it as gingery as the Trader Joe's stuff, you'll want to put a few pieces of ginger in a garlic press and really mash them up to get some more juice out.
Serve over ice. And if you're of legal drinking age, I consider it obligatory to add some rum (yes, even if it's 9 am). After some necessary experimentation, I found that vanilla rum works great.