Dice the onion and crush the garlic before frying them in some olive oil.
Pour in the rice and let it "crack" for about 5 minutes, stirring to avoid it sticking too much
to the bottom.
Add the lemon juice and thyme.
Slowly add about half of the vegetable stock and continue stirring.
Add the zucchini, peas, and a bit more stock. Keep adding as the liquid is absorbed, until all stock is in.
Cover the pot while it cooks for about 20 minutes.
You shouldn't need to add any salt, as the stock seasons things well (as does the upcoming
parmigiano).
Add in the parmigiano and lemon zest, then crack some fresh black pepper over each portion when serving.