Crockpot Green Bean Casserole

Bahan-bahan (8 porsi)

• 8 cups frozen cut green beans (thawed (2 lbs))
• 21 ounces condensed cream of mushroom soup ((2 cans))
• 1 cup milk
• 2 teaspoons soy sauce
• ¾ teaspoon black pepper
• ¼ teaspoon seasoned salt (or to taste)
• 3 cups crispy fried onions (divided)