My husband actually named one of my baking dishes after this recipe, because that was all I used it for when we were first married. I had forgotten about this recipe, but came across it again in a recipe swap.
Simple Baked Pasta
1 jar spaghetti sauce, flavor of your choice
1 jar water
1 lb pasta, your choice of type
Put pasta into a 9x13 inch (or in our case, 7x11) baking dish. Pour sauce over the top. Fill jar with water and pour over the pasta. Stir together. Bake at 350 degrees for approximately 45 minutes, until the noodles are tender. Top with cheese, and return to oven to melt.
Wah-la! You're done! I suppose that you could also add pre-browned meat to the casserole, but I have never experimented with that one.