Tonights tea was chicken and roast veg, using a jar of Marks & Spencer's garlic, lemon and parsley roast veg sauce. I think the cooking times might need to be increased a bit. Their instructions suggested adding the carrot after 20 minutes but I put them in at the start, so they had the full 50 minutes (at gas mark 6).

I do roast veg fairly often but I usually forget how long things take to cook, so this is as much for my information as anything else.

• Carrot and Celeriac: at least 1 hour
• Sweet potato: 50 minutes.
• Onion, Pepper, Courgette: 30 minutes.

All of my oven-based recipes use gas marks because we have a gas cooker. For conversions to electric, use this table.