This is another Real Simple "classic." As if lasagna wasn't already easy enough, let's try microwaving it to save 5 minutes of cooking time.
Bomb! Epic Fail! (But still edible).
1 15-ounce container ricotta
4 cups baby spinach, chopped (about 4 ounces)
2 cups grated mozzarella (8 ounces)
1/4 cup plus 2 tablespoons grated Parmesan (1 1/2 ounces)
kosher salt and black pepper
1 24-ounce jar marinara sauce (2 3/4 cups)
6 no-boil lasagna noodles
In a bowl, combine the ricotta, spinach, 1 ½ cups of the mozzarella, ¼ cup of the Parmesan, and ¼ teaspoon each salt and pepper.
In the bottom of a microwave-safe 8-inch square baking dish, spread ½ cup of the sauce.
Top the sauce with 2 lasagna noodles, ½ cup of sauce, and half the ricotta mixture. Repeat.
Top with the remaining lasagna noodles, sauce, mozzarella, and Parmesan.
Cover with wax or parchment paper, then a plate. Microwave on high (power level 10) until the noodles are tender, 15 to 20 minutes.
Let stand for 10 minutes before serving.
I would not make this again. Traditional lasagna in the oven is just as good and the cheese doesn't blacken. I didn't even cook it for the full time.