INGREDIENTS
1 tsp
Lemon, zest
2 1/2 cups
Mashed potatoes
8
Sage, fresh leaves
1
Egg yolk, large
1 1/4 cups
All-purpose flour
1 pinch
Black pepper, freshly ground
1 tbsp
Salt
3 tbsp
Olive oil, extra-virgin
3 tbsp
Butter, unsalted
1/4 cup
Parmesan cheese, grated