Boil the water for your pasta in your large pot with plenty of salt.
Once your onions have started to caramelize, you can add the cherry tomatoes and mushrooms. Leave to cook until the mushrooms are as tender as you like them.
Add the penne to boil.
Season your mushrooms with salt, pepper and the thyme.
Then add the cooking cream and the fresh parsley. Mix and take the sauce off the heat.
Drain the pasta and add it to your sauce pot. Mix well and serve.
Finish your tomato mushroom pasta with a generous grating of parmesan cheese.