Mascarpone and Lemon Gnocchi

INGREDIENTS

• 1/2 cup grated Parmesan, for serving
• 1 large egg, at room temperature
• 1/2 cup extra-virgin olive oil
• 2 large lemons, zested
• 1 cup mascarpone, at room temperature (8 ounces)
• 1/2 cup chopped fresh basil
• 1/4 teaspoon kosher salt
• 1 teaspoon kosher salt
• 1 large egg yolk, at room temperature
• 1/4 teaspoon ground nutmeg
• 1 cup grated Parmesan (4 ounces)
• 3/4 cup all-purpose flour, plus extra for forming the gnocchi