Gratin Of Penne And Vegetables

Preparation

1. Step 1

   Bring the 3 quarts of water to a boil in a large pot and add the penne. Cook for approximately 8 minutes, until just tender, and drain. Rinse briefly under cool water to stop the cooking if you don't intend to assemble the dish immediately.

2. Step 2

   Bring ⅓ cup of water to a boil in a large skillet. Add the broccoli pieces, cover, return to the boil and cook for 3 minutes, or until most of the water has evaporated. Add the mushrooms, red pepper, walnuts and olive oil and mix well. Add the spinach, still wet from washing, cover and cook 2 to 3 minutes, or until it is wilted. (At this point, the vegetables can be combined with the warm pasta, seasoned with salt and pepper and served with a little grated Parmesan cheese as a side dish.) For the gratin, set the vegetables aside while you make the sauce.

3. Step 3

   For the bechamel sauce, melt the butter in a saucepan. Add the flour, mixing it in well with a whisk. Stir in the milk and bring the mixture to a boil, stirring with a whisk (especially around the edges where it might have a tendency to burn) until lightly thickened. Add the cream and salt and pepper, then return to the boil. Set aside.

4. Step 4

   When ready to serve, mix together the vegetables, pasta and bechamel sauce and stir in the Swiss cheese. Spread the mixture into a 10-to-12-cup gratin dish. If the ingredients are still hot, place the dish under a hot broiler for 5 minutes, until the top is lightly browned. If some of the ingredients are lukewarm or cool, heat the gratin for about 10 minutes in a 400-degree oven until bubbling hot, then brown for 5 minutes under the broiler. If the mixture is cool throughout, place the gratin in a 400-degree oven for approximately 15 to 20 minutes, then place under the broiler for 5 minutes. Serve immediately.