This is what I do every non-fasting Sunday for common meal:
A bag of frozen ravioli. Dump this into the crock pot, frozen. A jar of pasta sauce. Dump this in as well. Plug in, and turn on high, and in about 3 hours (the time it takes for Sunday School and Liturgy), it will all be perfect.
Oh, and just so anyone can know, Lasagna noodles, even the regular kind, do NOT have to be pre-cooked unless you barely put any sauce on your lasagna.
And did you know, that a can of plain pumpkin and a box of cake mix (spice cake is delish) such as dark fudge chocolate makes an excellent low fat, very moist and not at all rubbery (lenten) cake?