Bring a large pot of water to the boil and add a tablespoon of salt. Cook the spinach in the water for one until it is wilted and then scoop it out with a slotted spoon into a colander and drain it.
Add noodles to the boiling water and cook them according to package directions. Drain.
Meanwhile, heat ricotta in heavy small saucepan until smooth. Stir over low heat for 2 minutes, add mozzarella and stir until melted, about one minute more. Remove from heat and grind in some pepper.
Warm the marinara sauce in separate saucepan.
Time to assemble! Line up 4 soup bowls and ladle a quarter cup of sauce into each bowl. Top with two noodles. Divide spinach on top of noodles, and then divide cheese mixture on top of spinach. Top with second later of noodles, remaining sauce and grated parmesan. Serve at once.
Notes
Spinach: We love baby spinach for this recipe but you can also use regular spinach – just give it a good chop after you cook it.
Lasagna Noodles: Get the regular ones (not the pre-cooked ones) for this recipe.