Juice two lemons and set the juice aside for another use (like salad dressing or lemonade). You'll be using the leftover rinds in your simmer pot. Peel one orange and enjoy the fruit as a snack—just be sure to save the peels!
Place the citrus peels into a medium-sized pot.
peel of 2 lemon, peel of 1 orange
Add the sprigs of fresh rosemary to the pot. Pour in 4 cups of water, or enough to mostly cover the ingredients.
3 sprigs fresh rosemary, 4 cups water
Add the of vanilla extract.
1 tsp vanilla extract
Place the pot on the stovetop and bring it up to a gentle simmer over low heat.
Let it simmer uncovered, keeping an eye on the water level. As the water evaporates, add more to keep the pot from drying out.