Fill 4 (8 to 10-ounce) highball glasses with ice cubes. Divide the lemon and cucumber slices among the glasses.
In a large pitcher, pour in the seltzer, lemonade and Pimm's. Stir to combine. Pour mixture into prepared glasses and enjoy!
Gabriele shares his family recipe for a delicious summertime libation.
55 Simple Slow Cooker Recipes