Mushroom Casserole

Ingredients:
¼ cup olive oil plus more for the pan
32 oz baby Bella mushrooms sliced
1 tsp salt
2 Tbsp Minced Onion
1 Tbsp Minced Garlic
½ tsp Black Pepper
½ tsp Thyme
1 cup Gruyere cheese, shredded
1 tsp parsley for garnish

Directions:
Preheat your oven to 400 degrees F and grease a 2-quart baking dish with olive oil.
Heat the olive oil in a large, deep skillet over medium-high heat. Add the mushrooms and kosher salt. Cook, stirring occasionally, until the mushrooms have released their liquid and the liquids have mostly evaporated, about 10 minutes.
Add the onion, garlic, black pepper, and thyme. Cook, stirring, for one more minute. Remove from heat.
Transfer the mixture to the prepared baking dish. Sprinkle it with the shredded cheese.
Bake the casserole until hot and bubbly, about 15 minutes. Sprinkle with parsley and serve.