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1
For the smoked tomato granita, line a wok with foil. Place the peppercorns, salt, sugar, rice, tea leaves and grated peel of 1/2 orange on the foil. Place a wire rack on top of the wok and lightly brush the rack with oil.
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2
Place wok on high heat for 2 mins, or until smoke forms. Place tomatoes, skin-side down, on rack. Cover with a lid to contain smoke; smoke for 5 mins. Remove from heat. Coarsely chop tomatoes.
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3
Heat the canola oil in a medium skillet on medium heat. Add onion and cook gently until soft. Add tomatoes. Reduce heat to low; simmer for 8-10 mins, until liquid has evaporated. Transfer to a blender and puree until smooth. Strain tomatoes and return to blender. Add remaining granita ingredients and blend again until smooth. Strain again. Transfer to a plastic container and freeze overnight.
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4
For the tuna ceviche, mix the oil, onion, celery, chili pepper, garlic, ginger, parsley and lemon and lime juices in a bowl. Divide tuna slices among plates. Place a generous amount of marinade mixture on each slice. Allow to marinate for at least 10 mins.
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5
Top tuna with radish and granita. Garnish with micro greens or edible flowers, if desired. Drizzle with extra virgin olive oil.