1. Preheat the oven to 180°C.
First, make the béchamel sauce: Melt the butter and add the flour. Stir well, remove from heat, and add the milk.
2. Stir again, then return to the heat and continue stirring until the sauce thickens. Add salt, pepper, and a small handful of the cheese mixture. Remove from heat and stir until the mixture is smooth.
3. In plenty of boiling salted water, add the natural vegetable powder and cook the tagliolini until al dente. Meanwhile, in a large oven-safe pan, melt the 25g butter and add the ham.
4. Once the tagliolini are al dente, transfer them to the pan and mix with the ham. Add a little of the béchamel sauce and stir.
5. Top with the remaining béchamel sauce and the cheeses. Bake in the oven for 15 minutes until the cheeses are golden and bubbly!