Step 1

Preheat oven to 375.

Step 2

Slice mushrooms and shallots thinly.

Step 3

Heat up a medium cooking pan and add oil. Season mushrooms and onions with some salt and pepper. Saute them over medium heat until just done. Drain off the mushroom juices.

Step 4

Combine sour cream, heavy whipping cream, garlic powder, salt, and pepper in a bowl and mix well. (Salt to taste but remember you salted mushrooms as well.)

Step 5

Add creamy mixture to the mushrooms, stir well and heat through.

Step 6

Transfer mushroom mixture into a baking dish and spread shredded cheese over the top. Bake for 10-15 minutes.