-
Heat the oven to 200C/180C fan/gas 6. Put the prepared vegetables on a large baking tray, drizzle over 2 Tbsp oil and toss together, season with salt and pepper. Roast for 30 minutes.
-
Meanwhile, heat the rest of the oil in a frying pan, add the mushrooms and stir fry for 3-4 minutes until tender. Add Oyster Sauce and cook a further minute.
-
When the vegetables come out of the oven, add mushrooms, toss together then spoon half into a 20x30cm baking dish. Spoon over half of the passatta and arrange a layer of lasagne sheets on top. Repeat the layers.
-
Squeeze out as much water from the spinach as possible, put into a bowl and add the egg, Oyster Sauce, ricotta and parmesan, and season with black pepper, mix together then spoon evenly on top of the lasagne.
-
Return the dish to the oven and bake at 190C/170C fan/gas 5 for 30 minutes until golden, cover with foil if it browns too quickly.