onion - 1/4 onion (finely chopped, about quarter of an onion)
spring onion - 1 (chopped lengthwise)
celery stalk - 1 stalk (remove stringy bits, chopped)
asparagus - 10 stalks (tops reserved, stalks cut into small pieces)
fresh peas - generous handful (or frozen peas if fresh unavailable)
butter - knob + small knob (for cooking and finishing)
olive oil - 1 tablespoon (good quality, about 1 tablespoon)
arborio rice - watch the video to see (about four handfuls)
white wine - 1/2 glass (half a glass, drinkable quality)
chicken or vegetable stock - 1.5 liters (very hot, about 1.5 liters)
parmesan cheese - 2 tablespoons (grated, couple of tablespoons)
lemon zest - watch the video to see (a little, do not overdo)
fresh mint - watch the video to see (finely chopped, small amount)