Mushroom Casserole

This deliciously cheesy mushroom casserole is wonderfully flavored with onions, thyme, and melted gruyere.

Ingredients

▢ ¼ cup olive oil plus more for the pan
▢ 32 oz baby Bella or crimini mushrooms sliced
▢ 2 teaspoons Diamond Crystal kosher salt or 1 teaspoon of fine salt
▢ 1 cup onions chopped
▢ 1 tablespoon fresh garlic minced
▢ ½ teaspoon black pepper
▢ ½ teaspoon dried thyme
▢ 1 cup Gruyere cheese shredded
▢ 1 teaspoon dried parsley for garnish

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