Ingredients
- 1 teaspoon butter
- 2 large onions, chopped
- 1 cup sliced baby portobello mushrooms
- 1/2 (12 ounce) package bacon
- 1 (12 fluid ounce) can evaporated milk
- 6 eggs
- 5 pounds Idaho potatoes, shredded
- 1 cup chopped sun-dried tomatoes
- Salt and ground black pepper to taste
- 2 cups shredded Cheddar cheese, divided
- 1/4 cup sour cream, or to taste
Directions
Preheat oven to 350 degrees F (175 degrees C). Butter a 9×13-inch casserole dish.
Heat butter in a skillet over medium heat; cook and stir onions and mushrooms until softened and tender, about 10 minutes.
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Place bacon in a large skillet and cook over medium-high heat, turning occasionally, until evenly browned, about 10 minutes. Drain the bacon slices on paper towels, reserving 1 tablespoon bacon grease. Crumble bacon.
Beat milk, eggs, and reserved 1 tablespoon bacon grease together in a bowl; fold in potatoes until evenly mixed. Stir onion-mushroom mixture and sun-dried tomatoes into potato mixture; season with salt and pepper. Pour potato mixture, including all the liquid, into the prepared casserole dish. Sprinkle bacon and 1 1/2 cup Cheddar cheese over potato mixture.
Bake in the preheated oven until potatoes are tender and cheese is melted, about 55 minutes. Sprinkle remaining 1/2 cup Cheddar cheese over potato mixture and continue baking until melted, about 5 minutes more. Serve with sour cream.