Start by adding olive oil to a large pot over medium heat. You will know it is ready when it shimmers slightly. This oil creates a flavorful base for the soup. Be careful not to let it smoke, or the flavor will take a hit.
Add the chopped shallots and let them soften for a few minutes until they smell sweet and fragrant. Stir occasionally to avoid burning. This step builds that delicious foundation, so keep an eye out to prevent any browning.
Toss in the diced celery and carrots, and cook until slightly tender, noticing their colors brightening. This adds a comforting sweetness that complements the soup's base, but do not cook them too long or they might lose their crunch.
Slowly pour in the chicken broth and add bay leaves, rosemary, thyme, salt, and pepper. Stir well and let it come to a gentle boil. The aroma should fill your kitchen. Just ensure the broth is not boiling too vigorously, as this can affect the simmering later.
Once it is boiling, add the Acini Di Pepe pasta and stir. Let it cook until al dente for about ten minutes. Be cautious not to overcook it, as that can make it mushy.
After cooking the pasta, add your leftover turkey or rotisserie chicken. Stir until everything is heated through. The smell should be incredible! Just remember, if you overheat, the chicken might dry out a bit.
Taste your soup and feel free to add more salt, pepper, or herbs if needed. It should feel balanced and warm in flavor.