Place potatoes in large saucepan. Cover with water. Add 1 tablespoon of Marinade Mix to water. Bring to boil. Reduce heat to low; cover and simmer 10 to 15 minutes or until potatoes are fork tender. Drain and return to saucepan.
Preheat oven to 350°F. Add milk, sour cream, 1/2 cup Cheddar cheese, 1/2 of the bacon and remaining Marinade Mix to sauce pan. Using potato masher or hand mixer, mash until smooth.
Transfer mixture to 2-quart casserole dish. Sprinkle with remaining cheese and bacon. Bake 15 minutes. Sprinkle with green onions. Serve with broccoli florets, chicken nuggets or thick cut potato chips.