½ cup pastina pasta (or stelline, orzo, acini di pepe)
4 cups chicken broth (or vegetable broth for vegetarian option)
1 tablespoon butter or olive oil
¼ cup grated Parmesan cheese
1 egg (optional, for creaminess)
1 small garlic clove, minced (optional)
1 small onion, finely chopped (optional)
Salt and black pepper, to taste
Fresh parsley or basil, chopped, for garnish