Hi OP. I have been using a recipe from BBC Good Food called Foolproof Slow Roast Chicken. You do not have to parboil the potatoes, but it takes a bit longer. There are absolutely loads of comments below it with advice that are worth reading. I have summarised them into my version of the recipe. I hope this comes out formatted OK. Has become my regular method of cooking a chicken.
Here it is:
This is the original ingredients:
butter, for greasing
chicken whole 1.6kg for roast
1kg potatoes for roasting, halved or quartered if large
2 whole heads garlic, halved through the middle
100ml white wine for roast
100ml chicken stock
2 stems rosemary for roast, broken into sprigs (or thyme perhaps)
2-3 bay leaves for roast
1 lemon for roast, cut into wedges (perhaps leave this out)
Carrots for roasting, I cut them into large slices, about an inch long
DIRECTIONS
There are 175 reviews of this on the website. Lots of tips, inc how to make gravy. Try to get correct potatoes for roasting.
Takes 2½ hours from putting in oven.
Heat oven to 160C/fan 140C/gas 3. Brush a large roasting tin all over with butter and smear some over the skin of the chicken.
Place the chicken in the tin and arrange the potatoes around it. Put the halved garlic heads in the tin, pour over the white wine and stock, then cover with foil and place in the oven. Cook for 1 hr then remove the foil and give the potatoes a shake. Add the herbs and lemon wedges, then cook uncovered for 50 mins.
Turn the heat up to 220C/fan 200C/gas 7. Cook for 30 mins more, then remove the chicken and potatoes from the pan. (Could put peppers in to roast at this point). Cover the chicken loosely with foil and leave to rest on a plate for at least 10 mins before carving.
At this point I remove the potatoes to a baking tray and put back in oven on the top shelf so they crisp up.
Serve with any pan juices. (I actually make gravy by straining and adding thickening and stock.)
Tips suggest keeping potatoes small and putting them back in the oven at the end to crisp up while you make the gravy. Also lots say very lemony - try smaller lemon wedge only in the cavity, otherwise potatoes too lemony. Can also sit the chicken on some onion for added flavour, or put half onion in cavity.
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