Adjust portions to fit pan size and taste preference.
Melt butter until hot and bubbly over medium to medium high heat in a large deep skillet or dutch oven. Add potatoes (should be a single layer or close to a single layer of potatoes); season to taste. Cook 6-7 minutes, turn.
Add meat over potatoes; pile spinach on top of meat and sprinkle with a touch of water (no more than about 1-teaspoon is needed); cover and partially wilt spinach 1-2 minutes. Make small hollows or nests in the spinach and gently add 1 egg to a hollow. Season to taste, cover, reduce heat to medium to medium-low; cook 7-8 minutes or until spinach is wilted, and egg whites are completely cooked (egg yolks cooked to preference).