Baked pasta with ham and cheese

Method

1. Preheat the oven to 200 °C. Butter an oven dish of about 30 × 20 cm with 10 g of the butter.
2. Cook the penne in 4 L of boiling water with 1 tablespoon of salt for 2 minutes less than the packet says (it finishes in the oven) and drain.
3. While the pasta cooks, chop the onion and garlic. In a pan over medium heat, melt the remaining 20 g of butter and soften the onion for 4 minutes; add the garlic and stir for 1 minute.
4. Add the passata, 150 ml of water and half the oregano; season with salt and pepper and simmer for 8 minutes over low heat.
5. Cut the ham into strips and slice the olives. In a bowl, toss the pasta with the sauce, ham, olives and half the mozzarella, and spread it in the dish.
6. Top with the rest of the mozzarella and the oregano and bake for 20 minutes, until the cheese melts and browns at the edges. Let it settle for 5 minutes before serving.