Keto Chicken Alfredo Casserole

Ingredients

• 1 pound chicken breast, cubed, skinless, boneless
• 2 tbsp butter
• ½ cup cream cheese
• 2 tbsp parsley, fresh
• 1-1/2 cup heavy cream
• Salt and pepper, or to taste
• 2 cups mushrooms, pieces or slices
• 1/2 cup parmesan cheese, grated
• 2 cups spinach, chopped
• 2 cloves garlic, minced
• 1/2 tsp Italian herb seasoning
• 1 tbsp olive oil