1 box Lasagna pasta
1 container ricotta cheese
1 can chopped spinach
1 jar marinara
1/2 cup shredded mozzarella cheese
Preheat oven to 350 degrees.
Cook lasagna as directed on box. Drain and lay out pasta on parchment paper or a sheet of aluminum foil. Empty ricotta cheese into a medium size bowl. Drain liquid from can of spinach. Mix spinach with ricotta cheese. Spoon about 1/2 cup of ricotta/spinach mix on the end of one lasagna noodle and roll up from that end. Place into a baking dish. Repeat as many times as needed (I make about 8 roll-ups, but you can make as many as you'd like). Spread marinara over roll-ups. Sprinkle mozzarella cheese.
Bake for 30-35 min.
I've also tried black beans mixed into the ricotta cheese. It was pretty good. Worth a try.