- 5 tbs olive oil, divided, plus extra for drizzling
- 1 large onion, finely chopped
- 450 g (6 cups) mixed mushrooms, cleaned and sliced
- 2 cloves garlic, finely chopped
- 450g (15 cups) baby spinach, washed
- 1 pinch red chilli flakes
- 1/2 tsp dried oregano
- 1/2 tsp dried thyme
- 6-8 large zucchini, trimmed
- 675g (3 cups) ricotta
- 100g (2/3 cup) sunflower seeds
- 1/4 tsp freshly grated nutmeg
- Freshly ground black pepper
Preheat the oven to 200°C.
Heat 2 tbsp olive oil in a large frying pan set over medium heat. Add the onion and a pinch of salt, sweating until softened, 5-7 minutes.
Add the mushrooms and another pinch of salt; cook, stirring occasionally, until the mushrooms are soft and have released their juices, 5-7 minutes. Add the garlic and cook, stirring frequently, for 2 minutes. Set off the heat.
Bring a large pot of salted water to a boil. Add the spinach and blanch for 30 seconds, stirring frequently. Drain well and refresh in a large bowl of iced water.
Drain well in a colander; press the spinach against the sides of the colander to get rid of as much excess water as possible. Roughly chop and then transfer to a large mixing bowl.
Add the onion-mushroom mixture, chilli flakes, dried herbs, some salt and pepper to taste; stir well.
Using a mandoline or chef’s knife, thinly slice the zucchinis lengthwise into long strips. Place in a large mixing bowl and add the remaining 2 tbsp olive oil, tossing to coat.
Preheat a griddle pan over moderate heat until hot. Working in batches, add the zucchini to the pan, griddling until lightly charred, turning once, 2-3 minutes. Remove to a plate.
Cover the base of the baking dish with a single layer of zucchini. Top with a layer of the spinach-mushroom mixture followed by a thin layer of ricotta. Repeat layering another two times, finishing with a layer of zucchini on top; drizzle with olive oil. Cover the dish with aluminium foil.
Bake for 30 minutes; discard the foil and continue to bake until the lasagne is golden-brown on top and the zucchini is soft to the tip of a knife, 20-30 minutes more.
Remove from the oven and let stand for 5 minutes. Top with sunflower seeds and some freshly grated nutmeg.