Delicious O'Brien Potatoes - A Great Crowd Pleaser

Why I Love This Recipe
I was asked to make potato recipe for a men's breakfast at our church and after searching our liberary of cookbooks I found the recipe for O'Brien potatoes. This recipe lend itself easely to prepare for a large crowd and is delicious.
Ingredients You'll Need
12 Tablespoons butter
6 onions, thinly sliced
24 large all purpose potatoes, peeled, cooked and diced
3 teaspoons dried thyme
2 teaspoons black pepper
2 green bell peppers, chopped
2 red bell peppers, chopped
2 cups evaporated milk
2 cups minced parsley
72 ounces cooked ham,diced
Directions
Clean the potatoes with a vegetable wash and cook them with the skin on in a large pot of boiling water. Cook until they are tender, but not mushy. Drain and run under cold water.
Peel and dice the potatoes and place in a large stainless steel bowl.
In a large skillet melt 6 tablespoons butter over moderately high heat. Add the onions and sauté for 5 minutes or until soft. Using a slotted spoon, remove the onions to a medium size bowl.
Add the remaining 6 tablespoons of butter to the skillet and stir in the potatoes, thyme and black pepper. Cook without stirring for 5 minutes or until the potatoes begin to brown. Stir and continue cooking 5 minutes more until browned throughout.
Return the onions to the skillet, add the ham and both green and red bell peppers, and cook 5 minutes or until vegetables are tender. Stir in the evaporated milk and parsley and cook 2 minutes