Spicy Tomato Crostini

Preparation:

Preparation: Roast the slices of pancarré and spread them lightly, when they are still hot, with butter on one side only, prepare a mixture with the onion, brown it in a nice piece of butter, together with a very finely chopped small ginger, add peeled tomatoes and minced and let it cook until a very thick sauce has formed, which you will add at the end a sip of milk. Remove from the heat and, after a while, add the yolk, working well. Spread the mixture on each slice of bread already prepared on the serving plate. Spend a moment in the oven and serve.