I started to post my recipe, but this is so similar that I thought I would just add it to a review! The recipe I follow is exactly the same but doubled (use a whole box of ziti, jar of spaghetti sauce, and 15 oz container of ricotta). I stir all of it together except keep back about 1/2 the spaghetti sauce and pour it on top of the pasta/cheese mixture before topping with the extra cheese. I like it like this but my husband demands that cooked Italian sausage be stirred into his half before baking. Quite easy and yummy.
As you say: quick, easy and tasty, but you forgot to mention "versatile" ;;-) Adding some extra taste to the sauce (in my case by using chillis) is necessary, though.