I like to set up an assembly line by spreading out all of the noodles on a sheet pan so I can fill them quickly. Another tip to make filling the rolls faster and less messy is to put the ricotta filling in a large resealable plastic bag. Snip a large hole out of one corner of the bag with scissors and use the bag to pipe the filling onto each noodle. To prepare the frozen lasagna rolls, thaw in the refrigerator overnight. Remove the plastic and bake, uncovered, at 375 degrees F until the sauce is bubbling and the cheese is melted, 35 to 40 minutes.