Dill is a great accompaniment for all the other flavors in this menu. It is used often in Greek cooking.
Heat oil in a medium saucepan over medium heat. Saute onion until softened, about 4 minutes. Add rice and capellini. Cook, stirring frequently, until slightly golden, about 4 minutes.
Add salt and broth; bring to a boil. Cover, reduce heat, and simmer until liquid is absorbed, about 20 minutes. Fluff rice with a fork, and stir in dill.