Yields: 4 servings.

4-5 Yukon Gold potatoes (about 1 pound), peeled and halved
2 cups cooked, shredded pot roast
3 tablespoons minced onion
1 large egg
2 tablespoons all-purpose flour
1 tablespoon chopped fresh parsley
Sea salt and freshly ground black pepper
1 tablespoon olive oil
1 tablespoon unsalted butter
2 teaspoons distilled white vinegar
Pinch of sea salt
1-2 large eggs per person
4 cups baby spinach or arugula, washed and drained

Potato Cakes: Preheat oven to 200˚. Place the potatoes in a large pot with enough water to cover by about 1 inch and bring to a boil. Reduce the heat to a simmer, cover, and cook until the potatoes are tender, 20 to 30 minutes. Drain and mash roughly with a potato masher; the potatoes do not have to be smooth. Combine the potatoes, 1 cup of the pot roast, the onion, egg, flour, and parsley in a large bowl and stir to thoroughly combine. Season with salt and pepper to taste and stir to mix. Form into four 3-inch-round, ½-inch-thick patties and refrigerate for about 15 minutes. Heat the olive oil and butter in a nonstick or cast-iron skillet over medium heat until hot. Add the cakes and cook for about 3 minutes per side, until golden brown and crispy. Place in the oven to keep warm.

Eggs: Fill another large skillet with water about 2 inches deep and bring to a boil. Add the vinegar and salt, and reduce the heat to a simmer. Add the eggs one at a time and poach for 2 to 3 minutes, until the whites set and a thin, translucent film forms over the yolks. Use a slotted spoon to gently transfer the eggs to a paper towel-lined platter to drain.

Greens: Just before serving, toss the greens with ¼ cup of the vinaigrette.

Assembly: Place 1 potato cake on each plate and top with 1 or 2 poached eggs and about ¼ cup of the remaining pot roast. Drizzle about ¼ cup of the remaining dressing on and around the eggs and top with a handful of the dressed greens. Season with salt and pepper to taste and serve warm, garnished with chives. 

Yields: ½ cup.

Horseradish-Mustard Vinaigrette

¼ cup extra-virgin olive oil
2 tablespoons distilled white vinegar
1 shallot, minced
1 tablespoon prepared horseradish
1 teaspoon Dijon mustard
Sea salt and freshly ground black pepper

Combine the olive oil, vinegar, shallot, horseradish, and mustard in a small bowl or a jar with a tight-fitting lid. Whisk or shake until well combined, season with salt and pepper to taste, and serve or refrigerate in an airtight container until ready to serve.