Cut the cucumbers lengthwise into 1/16 in. slices.In a saucepan over a medium heat, bring the vinegar, wine, sugar and corn syrup to a boil.Add the mustard seeds, remove from heat.Let cool to room temperature, pour over the cucumber slices and refrigerate for 2 hours.
Cucumber Tartar
Cut the cucumbers half lengthwise, scoop out the seeds.Cut into small chunks.Combine the cucumber, mint (dried mint), and season with olive oil, salt and pepper.
Cheese Mousse
Combine all of the ingredients in a food processor.Pour the mixture into a pan. Stir in frequently over medium heat. It will thicken as it heats. Remove from heat. Pour the cheese mixture into the silicon molds to half-fill. Spoon a little cucumber tartar on top and pour in the remaining mousse. Freeze for 1 hour until set.
Cucumber Jelly
Using immersion blender blend cucumber and mint. Strain the mixture with a colander. Pour into a saucepan. Add agar-agar powder. Let boil for 2 minutes and remove from the heat. Stir in salt. Pour a layer into a silicon mold and cill until set.
Serve
Place a cheese mousse on a serving plate, add cucumber jelly on the top. Drain pickled cucumbers and arrange them around the mousse.