Benedict Breakfast Hash

Name: Benedict Breakfast Hash
Ingredients: 2 tablespoons salted butter; 2 tablespoons olive oil; 8 ounces baby red potatoes, diced; 1 medium onion, diced; Kosher salt and freshly ground black pepper; 1 cup diced ham; 3 English muffins, cubed into bite-size pieces; 1 mounded cup baby spinach; 1 tablespoon chopped fresh parsley; 3 large egg yolks; 2 tablespoons lemon juice; 2 sticks salted butter; Pinch cayenne pepper; 1/2 teaspoon kosher salt; 1/4 teaspoon freshly ground black pepper; 3 tablespoons olive oil; 4 large eggs