Step 1

Prick potato in several spots with a fork; microwave on High for 4 minutes. Let cool for 5 minutes, then chop into 1/2-inch cubes.

Step 2

Meanwhile, cook bacon over medium-high heat in an 8-inch cast-iron skillet until crisp. Remove the bacon from the skillet, but leave the bacon drippings in the pan. Add oil and diced potatoes and cook, stirring frequently, until the potatoes are browned, about 5 minutes. Add spinach; stir to combine and just wilt, about 1 minute. Season with salt.

Step 3

Make 2 wells in the center of the hash and crack one egg into each well. Reduce the heat to medium and cook until the eggs are partially set, 2 to 3 minutes. Sprinkle with cheese, cover and cook until the cheese is melted and the eggs whites are completely set, 1 to 2 minutes.

Step 4

Chop the bacon and sprinkle on top. Garnish with a generous grinding of pepper.