Zest the lemon and set aside.
Squeeze the juice from the lemon and set aside.
Chop the carrots into uniform slices, about 1/4 inch wide. Set aside.
Slice the white, and a bit of the light green, parts of the leeks. Cut the slices in half to form half moon pieces.
Clean the leeks very carefully. See the Tips & Tricks, below. Set aside.
Lightly chop the fresh thyme. Cut the sage into very small pieces. Set aside.
Heat 1 tbsp of olive oil in a Dutch oven or large pot over medium-high heat.
Carefully add the leeks and carrots, cooking until just starting to soften, about 5-6 minutes, stirring occasionally. Turn the temperature to medium heat if the leeks start to brown.
Add the fresh thyme and fresh sage to the pot and cook, stirring, until fragrant, about one minute.
Pour in the chicken broth.
Add the lemon juice and lemon zest.
Stir in the orzo and let cook until tender, about 9 minutes.
While the orzo is cooking, shred the chicken. I use the white breast meat and pull it into bite-sized pieces with my hands. You can also use two forks if you want to be neater. Add to a bowl and set aside.
When the orzo is cooked, add the chicken to the soup and stir. Allow to heat through, about 3 minutes.
Lightly salt and pepper to taste.
Snip 1 tbsp fresh dill over the soup at the very end of the cooking time.
You can snip some fresh parsley over the individual bowls of hot soup and/or add some freshly grated parmesan.
Serve with lemon wedges to squeeze over the soup for extra lemony broth.