First clean the mushrooms, cut off the stalks and cut into slices. Place in the Varoma® container and season lightly with salt and pepper. Make sure that some cooking slits remain free so that the steam can rise.
Next, wash the zucchinis, cut off the ends and slice. Season lightly with salt and pepper and place in the Varoma® tray.
Pour 500 g water into the mixing bowl, place the Varoma® on top and add the vegetables. 20 min. / Varoma® / Level 1 steaming.
Then remove the Varoma® and pour out the water.
Tomato sauce:
To do this, peel the carrots and cut into large pieces. Peel and quarter the onion. Peel and halve the garlic cloves. Put everything into the mixing bowl and 5 sec. / Chop level 7.
Scrape everything down with the spatula, then add the olive oil, tomato purée and sugar and 3 min. / 120° / level 2 steam.
Then add the remaining ingredients, i.e. the chopped tomatoes, vegetable stock, salt and Italian herbs, and stir to combine. 10 min. / 100° / simmer at level 1.
Béchamel sauce:
Put all the ingredients for the béchamel sauce into the mixing bowl and turn the control knob to 12 min. / 100° / level 2 place.
Now preheat the oven to 180° C top/bottom heat.
Now it's time for layering:
Grease the casserole dish with butter.
Then place 4 lasagne sheets in the dish, pour 1⁄3 of the tomato sauce over them, arrange half of the mushroom and zucchini slices on top and pour 1⁄3 of the béchamel sauce over them.
Repeat the above steps twice more, except that in the last layer there are no vegetables between the tomato sauce and the béchamel sauce.
Finally, sprinkle with grated cheese and bake in the oven for 30 minutes.
Enjoy your meal!
Notes
This sauce recipe is generous enough for any regular-sized casserole dish. Feel free to adjust the amount you use based on your preference for a drier or juicier casserole.
Bonus tip: The leftover sauce is delicious the next day over pasta or rice – waste not, want not!
And don't be afraid to get creative! This recipe is easily customizable. Vegetables like eggplant or peppers are great substitutes for the ones listed. So have fun and experiment!