Peel the onion and cut into small cubes.
Fry in vegetable oil until a nice Golden color, about 7-10 minutes, stirring constantly. Salt.
Wash and clean the mushrooms. Cut into thin slices.
Add the rosemary, 1/4 tsp red pepper flakes and mushrooms to the pan.
Continue roasting until the liquid from the mushrooms has completely evaporated. Season with salt and pepper at the end of cooking.
Boil the spaghetti in salted water for 1-2 minutes less than indicated on the package. Flip the colander.
We do not pour out the water, we will need it again.
In a small pan, dilute the tomato paste, adding 285 ml of water in which the spaghetti was cooked.
Add finely chopped garlic cloves, thyme, oregano, 1/4 tsp red pepper and smoked paprika. Stir.
Try it, add salt if necessary.
Cut the olives into half rings.
Prepare the dish for baking.
Begin to assemble the lasagna.
The first layer is tomato sauce.
The second layer is spaghetti.
The third layer is mushrooms and olives.
Top with tomato sauce.
Again, spaghetti.
Mushrooms and olives.
Tomato sauce.
Spaghetti.
Mushrooms and olives.
Spaghetti.
The final layer of tomato sauce.
And grated cheese on top. Send to bake for 20-25 minutes at 180 degrees.
Since almost all the ingredients are ready, all we need is for the cheese to melt and brown, and the spaghetti to absorb the flavors and aromas of the wonderful sauce.
Sprinkle the finished lasagna with chopped parsley.
Cut into portions and you can serve.
I am a fan of spicy, so I also sprinkle hot red pepper on top.
Bon Appetit!