Finely chop 1/2 onion and 3 garlic cloves.
Heat 2 tablespoons extra virgin olive oil in a small saucepan over medium heat.
Add the chopped onion, garlic, and 1/4 teaspoon salt; cook gently until softened, about 2–3 minutes.
Stir in 1 teaspoon dried oregano, 1 teaspoon dried dill, and 1/4 teaspoon black pepper.
Add 1 cup orzo and stir to coat the pasta with the oil and herbs.
Add 1 tablespoon lemon zest (reserve 1/2 teaspoon for garnish) and pour in 2 1/2 cups broth; bring to a simmer.
Simmer gently, uncovered, for about 10 minutes or until the orzo is tender and most liquid is absorbed; add a little extra broth or salted boiling water if it dries too quickly.
Taste and adjust seasoning with salt and pepper.
Transfer to a serving dish and finish with a drizzle of extra virgin olive oil, a squeeze of lemon juice, fresh dill, and the reserved lemon zest.