With just a handful of simple ingredients, you can make this cozy Pastina Soup to share with the kids in under 30 minutes. Look for little star "pastina" pasta in the pasta aisle.
Add the olive oil to a medium pot over medium heat. When warm, add the celery, carrot, and onion. Stir to coat and cook for 2 minutes, or until just starting to soften.
Add the broth and raise the heat to high. When the broth starts to boil, turn down the heat to medium so it simmers.
Add the pasta. Cook for about 8 minutes, stirring occasionally.
Stir in the peas, Parmesan, and lemon zest, if using.
Season to taste with salt and pepper. Serve warm.
Notes
Store leftovers in an airtight container for up to 5 days in the fridge. Warm in a heat-safe bowl in a small pot or in the microwave, adding broth if desired.