THAWED AND DRAINED SAUCE, YOUR FAVORITE COVER BOTTOM OF LASAGNE PAN WITH 1/3 OF THE SAUCE. ARRANGE LAYER OF UNCOOKED NOODLES (5-6 PCS) ON BOTTOM. COVER WITH SECOND 1/3 OF THE SAUCE. COMBINE RICOTTA, PARMESAN, AND SPINACH AND SPOON 1/2 OF THE MIXTURE OVER THE NOODLES. PUT A SECOND LAYER OF NOODLES OVER THE CHEESE MIXTURE, THEN THE REST OF THE CHEESE MIXTURE. COVER WITH REMAINING SAUCE. TOP WITH THE MOZARELLA AND JACK. ~ COVER WITH FOIL, DOMED SO THAT CHEESE DOESN'T STICK TO THE TOP. BAKE 45 MINUTES @ 375. REMOVE FOIL AND BAKE 20 MINUTES MORE. ~ ALLOW TO SET FOR 1/2 HOUR BEFORE CUTTING TO SERVE.