01 -
Preheat the grill or broiler in your oven for cooking the mushrooms.
02 -
Line a rimmed baking tray with aluminum foil.
03 -
Wipe the mushroom caps with a damp kitchen towel and remove any grit using a pastry brush. Remove stems, chop them finely, and set aside.
04 -
Mix the finely chopped garlic with the olive oil in a small bowl.
05 -
Using a pastry brush, coat the tops of the mushroom caps with the garlic oil mixture and place them on the lined baking tray.
06 -
Place the baking tray with mushroom caps under the grill or broiler for 5 minutes. Remove from oven.
07 -
Brush the interior of the mushroom caps with garlic oil and return to grill for an additional 2 minutes. Drain any excess juices from the caps to prevent sogginess. Set aside.
08 -
Squeeze out excess moisture from the defrosted spinach. Heat a medium-sized non-stick frying pan over medium heat. Add remaining garlic oil and the finely chopped mushroom stems. Cook for 2 minutes, stirring occasionally. Add the drained spinach and cook for 1–2 minutes until excess moisture evaporates. Transfer to a bowl to cool.
09 -
When cooled, mix the spinach mixture with crumbled feta cheese.
10 -
Season the interior of the mushroom caps with sea salt and freshly ground black pepper.
11 -
Fill the mushroom caps with the spinach mixture, gently pressing the mixture to make it firm.
12 -
Place sliced cherry tomatoes and bocconcini cheese on top of the spinach mixture.
13 -
Preheat the oven to 200°C (400°F). Place the stuffed mushroom caps in the oven and bake for 15 minutes, or until heated through and slightly golden.