This mouthwatering lasagna is a lazy cook's dream - it uses no-boil lasagna noodles and just 5 ingredients! Prep work is close to zero - this lasagna just cooks itself!
Pour the pasta sauce in a large bowl, add 1 cup of water to it and mix to combine. No-boil lasagna noodles require extra 1 cup of water in the recipe as they cook together with the lasagna and the water gets absorbed.
Optional - reserve a handful of baby spinach leaves for garnish.
Pour 1 cup of pasta sauce on the bottom of the 8x12 baking dish and spread to cover the bottom.
Put 3 lasagna noodles lengthwise side-by-side in a single layer. Put 2 noodles perpendicular on the ends of the baking dish to cover the gaps (you can break them to fit).
Spread half of the ricotta cheese with a spoon over the noodles.
Sprinkle 1/3 of the shredded mozzarella cheese over the ricotta.
Put 1/2 of the baby spinach leaves on top of cheese in a single layer.
Pour 1/3 of the pasta sauce on top of the spinach.
Repeat layering another noodle layer, ALL of the remaining ricotta cheese, HALF of the remaining mozzarella cheese, ALL of the remaining spinach and HALF of the remaining pasta sauce.
For the final layer, layer the lasagna noodles, spread the remaining pasta sauce and sprinkle with remaining mozzarella cheese.
Cover the baking dish with foil, put in the oven and bake for 45 minutes.
Optional: after the lasagna is cooked, sprinkle with reserved fresh spinach leaves for garnish.