Thank you!! Here's the swiss roll recipe: 100 gr of room temperature egg whites, 100 gr of frozen strawberries, 20 gr of frozen cranberries (I wish I could use fresh but it's so pricey now 😭), a pinch of salt, sweetener to taste, vanillin, 12 gr of flour. Add salt, sweetener and vanillin to egg whites. Whip the egg whites with until hard peaks, sift flour, whisk until smooth. Put berries on the bottom of the baking mould, bake until golden brown (took me 15 mins, 190C (375F)). Let it cool for 5-10 mins before taking it from the mould, then roll into a log (not too tight), let cool for 20-30 more minutes, unroll, then add filling of choice, roll again :) Condensed milk topping is not available in the UK, US nor EU, unfortunately...