1.For blood orange chips, slice tops off oranges and freeze until firm, but not frozen solid (2-2¼ hours). Meanwhile, bring sugar and 60ml water to the simmer in a small saucepan over medium heat, whisking to dissolve sugar, then cool to room temperature. Preheat oven to 75C and line an oven tray with baking paper. Thinly slice oranges on a mandolin, place on tray, brush both sides with sugar syrup and dry in oven until crisp (4½-5 hours; see note). Store in an airtight container until required. Blood orange crisps can be made up to 2 days ahead.
2.For pickled beetroot, preheat oven to 200C.Place beetroot in the centre of a 25cm-square piece of foil, drizzle with oil, season to taste and wrap tightly to enclose. Roast until just tender when pierced with a skewer (45-50 minutes), cool slightly, then peel, finely dice and transfer to a non-reactive container. Meanwhile, stir remaining ingredients and 120ml water in a small saucepan over medium-high heat until sugar dissolves, cool to room temperature, then pour over beetroot, cover and refrigerate to pickle (at least 6 hours or overnight).
3.For roast carrots, preheat oven to 75C and line an oven tray with baking paper. Bring carrot juice and herbs to the simmer in a large saucepan over medium-high heat, add carrots and simmer until just tender (5-6 minutes). Drain, toss with olive oil in a bowl, season to taste, then spread on prepared tray and roast until chewy and slightly shrunken (2½-3 hours). Keep warm.
4.Meanwhile, for charred leeks, blanch leeks until tender (2-3 minutes), drain and refresh, then drain well and pat dry with paper towels. Line a cast-iron frying pan with foil and spray with olive oil spray. Place leeks on foil, then cook over high heat, turning leeks occasionally, until well charred all over (7-8 minutes). Halve leeks lengthways and keep warm.
6.Dress shaved carrot and lamb’s lettuce with extra-virgin olive oil and lemon juice, and season to taste with salt. Dot crimson turnip cream and orange oil on plates, divide roast carrot and charred leek among plates, garnish with lamb’s lettuce and shaved carrot, and orange chips, and serve.
Note Blood orange oil is available from select health-food shops. The blood orange chips can also be made using a dehydrator. If baby crimson turnips are unavailable, substitute baby turnips.
Drink Suggestion: 2012 Skouras, Moscofilero, Peloponnese, Greece. Drink suggestion by Ben Aviram