Preheat your oven to 350 degrees.
Add your sausage to a skillet with olive oil and cook for 5 minutes on medium heat. Let them char up a bit.
Add your onion and mushroom, stir well and cook for 5-7 minutes. (If needed add a little more olive oil)
Add your garlic paste, stir in well and cook for 1 minute. Turn off heat!
Combine your cooked tortellini, pasta sauce and heavy cream. Mix well.
Now, combine your sausage mixture with your pasta. Mix well and pour into a baking dish.
Top with mozzarella and bake for 20 minutes.
Turn your broiler on for 5 minutes to crisp up the top.
Let your pasta bake cool for 5 minutes and top with fresh herbs. Enjoy!