
Cook the tortellini according to the package instructions and set it aside.
Meanwhile, prepare the sauce by heating a large skillet over medium heat. Add oil followed by sliced mushrooms. Cook the mushrooms for 4-7 minutes, then remove them to a plate and set aside.
In the same skillet, add the butter and garlic, and sauté for a minute. Sprinkle the flour and cook until the flour is lightly browned.
Stir in the chicken broth and let it boil for 2-3 minutes. Pour in the milk, and once it starts to boil, add the basil leaves, thyme, salt, and pepper. Let it simmer for 2 minutes.
Add the Asiago cheese and parmesan cheese. The sauce will start to thicken. Add the cooked tortellini and toss it in the sauce. If the pasta looks a little dry, add about ½ cup of the cooked pasta water and toss again.
Once done, sprinkle the crushed red pepper flakes, garnish with parsley, and serve.