Heat olive oil in a large pot over medium heat. Add onion and cook until softened, about 5 minutes.
Add garlic and cook for 1 minute more until fragrant.
Stir in the Arborio rice and cook for 2 minutes, stirring constantly, until lightly toasted.
Pour in the vegetable broth, lemon juice, and lemon zest. Bring to a boil, then reduce heat to low, cover, and simmer for 15-20 minutes, or until the rice is tender and the liquid is absorbed.
Stir in the chopped parsley, salt, and pepper.
Serve hot.
Notes
You can add a pinch of red pepper flakes for a little heat.
Garnish with extra parsley and lemon wedges if desired.