To make the pesto, combine all of the ingredients in a high speed blender and blend until smooth. Season futher to taste & set aside.
Pour the chicken broth into the pot and bring to a boil. Add the stelline, stir well, and reduce to a low simmer. Cover and simmer for 12-15 minutes, stirring often. The pasta should be soft and the broth should absorb.
Turn off the heat and remove the lid from the pot. Stir in the pesto and stir until fully incorporated and the pasta is coated.
Serve topped with a drizzle of olive oil, fresh pepper, and cheese if desired.
Notes
All nutritional information are estimations and will vary. Estimations do not include optional ingredients.