Preheat the oven to 190°C/375°F/gas 5.Scrub the sweet potatoes clean, slice into wedges, then spray or drizzle with 1 tablespoon of oil and toss in a large roasting tray with 1 heaped tablespoon of cornmeal or polenta, 1 heaped tablespoon of the Cajun seasoning and a pinch of sea salt and black pepper.Cut up your chicken (see my tips on how to joint a chicken below – you'll need to split the legs into thighs and drumsticks for this recipe as described in step 8), then remove and discard the skin and lay the pieces on a large baking tray (or keep the skin on, if you prefer).Spritz or drizzle the chicken with 1 tablespoon of oil and the remaining cornmeal or polenta and Cajun seasoning, squash over half the garlic through a garlic crusher, then toss and massage to coat the chicken. Place the chicken tray on the top shelf of the oven, pop the wedge tray underneath and cook for 20 minutes.Meanwhile, coarsely grate the cabbage, pear and peeled onion using a box grater. Tip into a bowl and mix with the mustard, 1 tablespoon of oil, 2 tablespoons of red wine vinegar and the yoghurt, then season to perfection. Crumble over the feta, if using, and pick over the dill fronds.Peel the remaining garlic and whiz in the food processor, then pulse in the bread and ½ a tablespoon of oil until you have fine breadcrumbs. Tip onto a tray. In a bowl, mix the flour with 4 tablespoons of water to make a paste.When the time’s up, remove the chicken from the oven, then carefully brush the pieces with the flour paste and use tongs to firmly press them into the breadcrumbs until they’re all evenly coated.Return the tray to the bottom of the oven, quickly turn the wedges and cook for a further 40 minutes, or until the chicken and sweet potatoes are golden and cooked through, rolling the frozen corn into the chicken tray (so it picks up all the lovely seasoning) and cooking alongside for the final 30 minutes. Take everything to the table, get excited and dig in.Adapted from Save with Jamie by Jamie Oliver, which is published by Penguin Michael Joseph © Jamie Oliver Enterprises Limited (2013 Save with Jamie).