Smalls Bar's Radishes with Bone-Marrow Rouille Recipe

Ingredients

• 16 mixed radishes, trimmed, scrubbed, halved lengthways or quartered
• Extra-virgin olive oil and beetroot powder to serve
• 1 egg, at room temperature
• 80 gm peeled, diced sebago potato
• 40 gm bone marrow, from about 1kg split marrow bones
• ¼ tsp butter
• ¼ tsp dried chilli flakes