Cook the lasagne sheets in boiling salted water until al dente, rinse in cold water, drain. Place the sheets on a clean kitchen towel. Heat the creamed spinach, stir in the cherry tomatoes. Spoon a little spinach onto each plate, place half a lasagne sheet on top, repeat the process. Spread the remaining spinach over the top.
Bring the water and vinegar to the boil in a pan, reduce the heat. Crack the eggs into a cup, one at a time, and carefully slide into the simmering water, poach for approx. 4 mins. Remove the eggs with a slotted spoon and drain. Place the poached egg on top of the spinach. Dollop the cream cheese on top, season with salt.