Try this Hash-Brown Eggs recipe.
Grated potatoes contain high amounts of moisture and starch that dictate whether the final dish achieves crisp edges or turns to mush. Raw potatoes require rinsing in cold water and thorough drying in a lint-free towel before hitting the pan, otherwise surface starches will bind and trap steam against the cast iron. Cast-iron skillets demand proper preheating over medium heat until a drop of water skitters across the surface before adding butter; insufficient thermal mass leads to sticking and uneven browning of the onions and potatoes. Substituting Russet potatoes with Yukon Golds alters the starch-to-sugar ratio, yielding a softer interior but a less lacey, golden crust. Swapping cheddar for a lower-moisture cheese like low-moisture mozzarella changes the melt behavior, resulting in stringy elasticity rather than a cohesive, toasted cheese skirt around the eggs. Adding salsa directly to the hot skillet during baking introduces excess liquid that softens the crisp potato base, which is why finishing the dish with cold condiments preserves the textural contrast. Raw onions release water as they fry, extending the cooking time needed to render the potatoes crisp; pre-cooking the onions separately cuts total skillet time by four minutes. Portion scaling requires precise pan sizing because overcrowding a ten-inch skillet prevents moisture from escaping efficiently. Leftovers stored in an airtight container for up to two days lose their crispness entirely, though reheating them in a toaster oven at 375 degrees F for eight minutes restores some structural integrity.