Squash the peeled tomatoes coarsely in an oiled casserole dish, salt and add the hot chilli pepper of your choosing. Cook for 8-10 minutes.
Spread everything on slices of bread, lay the cooked ham and small slices of Grana Padano DOP on top.
Put everything in a hot oven and when the cheese starts to melt, remove and serve.
Salted biscuits ideal for aperitifs and appetizers or for a healthy and genuine snack.