Make a thick beautiful bèchamel, be careful not to burn it, so stir often. You do like this: melt the butter in a pan and add a little milk and the flour. Then when it's all nicely incorporated, add the heavy cream, salt, lemon juice and rest of the milk. Stir it and watch it carefully until it thickens. Then take off from heat

Assemble your bread slices in a cake mold, layer by layer, first bread then bèchamel, then bread and finish with bèchamel.

Make a well in the middle and put the mozzarella in it. Top should be a bit visible. Cut the tomatoes in slices and arrange on top.

Add fresh basil on top, then breadcrumbs, drizzle with olive oil

Up in the oven, i used gas, level 6,till breadcrumbs golden.