Warm olive oil and 1 Tablespoon of the butter in a large Dutch oven or stockpot over medium-high heat. Add carrots and onion. Sauté, stirring frequently, for 4-5 minutes. While the veggies start cooking, season the chicken tenders generously with salt and pepper; set them aside.
1 Tablespoon olive oil, 3 Tablespoons butter, 3 medium carrots, 1/2 medium yellow onion, 1 pound uncooked chicken tenders, kosher salt and black pepper
To the carrots and onion, add garlic and Italian seasoning. Cook for 30-60 seconds, just until fragrant.
3 cloves garlic, 1 teaspoon Italian seasoning
Stir in the broth, then add chicken tenders to the pot. Cover the pot and bring the liquid to a boil. Once bubbling crack the lid open about one inch for steam to escape, reduce heat to medium, and simmer for 8 minutes.
6 cups low-sodium chicken broth or stock
Remove the lid and stir in pasta. Simmer for another 8-10 minutes, stirring frequently, just until the pasta is al dente according to package directions.
1 cup uncooked small shells, orzo
While the pasta is cooking, melt the remaining 2 Tablespoons butter and combine with the 2 Tablespoons flour to make a quick roux. Stir this into the soup as it cooks.
2 Tablespoons all-purpose flour
Next, remove the chicken and cut or shred into bite-sized pieces. Return chicken to the pot along with the lemon juice, parsley, and salt and pepper to taste. (I recommend starting with 1/4 teaspoon salt and 8-10 cracks of pepper, but you may want to add up to 1 teaspoon more. Salt generously until it tastes good!) Add more lemon to taste, as well.
1-2 Tablespoon lemons juice, 1 Tablespoon chopped fresh parsley
Serve and enjoy!