can. The sauce is what will soften the raw noodles as it cooks.
Repeat the layering: sprinkle the rest of the cooked sausage or beef over the sauced layer, then dollop and gently spread on the remaining ricotta mixture.
Pour the rest of the marinara sauce over the top, spreading it with the back of a spoon so all exposed noodles are moistened. If any noodles are sticking up dry, tuck them under the sauce. This helps them cook through evenly.