This is a dish I've found myself making a lot lately, probably because it's so easy and you can vary the content. I keep mine simple with sauce and vegetables but you could include anything, such as meatballs or even roasted nuts.
I'm posting the recipe I use which serves 2 people, maybe 3. Increase as you see fit.
You will need:
1 cup dry casarecce pasta
1/2 cup marinara sauce
1/3 cup ricotta cheese
1/2 tsp salt
1/2 cup either provolone or mozzarella cheese, shredded
2 tbsp grated parmesan cheese
1 cup fresh or frozen broccoli, spinach or asparagus
Heat the oven to 400 degrees. Boil the pasta and vegetables for about 10 minutes, or until the pasta is al dente. Strain and set aside. Mix together the salt, marinara and ricotta and add the pasta. Put into a baking dish and cover with the remaining cheeses. Bake for about 10 minutes, then broil until the top becomes bubbly and begins to brown. Remove from the oven and allow to cool for a few minutes before serving.