01 -
Set your oven to 375°F (190°C) and let it preheat. Line a tray with parchment paper. Spread olive oil on both sides of the mushroom caps, then arrange them on the tray with the gill side facing up.
02 -
Pop the mushrooms into the oven for about 10 minutes. As they cook, they'll release some of their water, giving you a less soggy result later.
03 -
While waiting for the mushrooms, warm the remaining olive oil in a big skillet over medium heat. Drop in the garlic and onion and cook them until soft, which should take around 3 to 4 minutes. Toss in the spinach and let it cook until it shrinks down, another 2 to 3 minutes. Take the pan off the stove and let it cool for a little bit.
04 -
In a large bowl, combine the cooled spinach mixture with the ricotta, Parmesan, salt, pepper, and a little nutmeg if you'd like. Stir it all up really well.
05 -
Use a spoon to fill each mushroom cap with the cheesy spinach mixture. Sprinkle mozzarella cheese over the top of each one.
06 -
Put the stuffed mushrooms back in the oven and bake them for 15 to 20 minutes. You'll know they're done when the cheese is bubbly and has a nice golden color.
07 -
For a finishing touch, sprinkle some extra Parmesan cheese over the top. Serve these while they’re hot, and enjoy!