Slow Cooker Chicken Stroganoff

Bahan-bahan (4 porsi)

• 1 & 1/2 pounds chicken breasts (about 3)
• 1/2 onion (chopped)
• 1 (.7-oz) package Italian salad dressing mix
• 2 tablespoons white wine (optional)
• 2 tablespoons butter (chopped into pieces)
• 1 (8-oz) package cream cheese
• 1/4 cup butter ((1/2 stick))
• 2 cloves garlic (minced)
• 1/4 cup flour
• 1/2 cup chicken broth
• 1/2 cup milk
• 1 teaspoon kosher salt
• 1/2 teaspoon black pepper
• 12 ounces egg noodles (cooked (to serve with))
• parsley (chopped, optional (to garnish))
• sour cream (to garnish (optional))