Add 1/2 cup of the sour cream mix to the bottom of pan, spread out evenly. Add a layer of sliced potatoes to bottom of pan. Add 1/3 of remaining sour cream, 1/2 of the diced ham, 1/2 of the onions and 1/3 of cheese mixture. Repeat another layer of potatoes, sour cream, ham, onions and cheese. Finish the top layer with potatoes, sour cream, cheese, 1/2 teaspoon smoked paprika, 1 teaspoon dried cilantro and 1 teaspoon oregano.