Into a blender, add the condensed milk, the table cream and the whole milk at room temperature. Dissolve both lime jelly powders in 200ml of water and add it to the blender with the other ingredients. Blend until combined.
Grease a ring cake tin with a drizzle of oil and spread evenly. Transfer the mixture from the blender to the cake tin, let it chill in the fridge for 2 to 4 hours.
Remove from the fridge and run a knife along the edges and center of the tin to make it easier to unmold.
Top the jelly pudding with some lime zest (optional).