To make the polenta, bring 550ml water to the boil with the milk and bay in a pan. Steadily pour in the polenta and whisk vigorously until incorporated, making sure there are no lumps. Cook for 30 mins, stirring often, adding a little more water if needed, then stir in the Tabasco and cheddar until melted. Remove the pan from the heat, take out the bay leaf and cover with a tea towel to keep warm.
Meanwhile, take the prawns out of the fridge to bring to room temperature and season with some salt.
Make the butter by blitzing all the ingredients with 2 tbsp water in a food processor until combined.
Heat a frying pan. Brush the corn with some rapeseed oil and salt and fry, turning until the corn is puffed and deep yellow and starting to char. Remove from the pan, allow to cool for a min, then slice the corn from the cob and stir into the polenta.
Heat some oil in the frying pan and add the prawns. Cook over a high heat for 2 mins or until pink, then add the wine, bring to the bubble and turn the prawns over. Add 2 tbsp of the devilled butter to the pan and toss the prawns in it as it melts. Stir another tbsp of the butter through the polenta, then divide between two bowls, top with the prawns, pan juices and spring onion.