01 -
Preheat oven to 375°F (190°C).
02 -
Slice mushrooms and shallots thinly for even cooking.
03 -
Heat canola oil in a medium skillet over medium heat. Add mushrooms and shallots, seasoning with salt and black pepper. Sauté until mushrooms are just cooked and shallots are translucent, about 6-8 minutes. Carefully drain off excess mushroom liquid.
04 -
In a mixing bowl, whisk together sour cream, heavy whipping cream, garlic powder, salt, and pepper until fully combined.
05 -
Add the cream mixture to the sautéed mushrooms and shallots in the skillet. Stir to coat evenly and allow the mixture to heat through, about 2-3 minutes.
06 -
Transfer the mushroom mixture to a baking dish. Evenly spread shredded Mozzarella cheese over the top.
07 -
Bake in the preheated oven for 10-15 minutes, or until the cheese is melted and golden.