Easy Cubed Steak Dinner

Ingredients (8)

• 4 beef cubed steaks
• Salt and freshly ground black pepper (to taste)
• 3 tablespoons clarified butter or ghee (divided)
• 1 8-ounce package sliced mushrooms
• 1 small onion, thinly sliced
• 1 cup beef stock
• 1 tablespoon cornstarch
• 1/2 cup water