Beet and Ricotta Gnocchi

Name: Beet and Ricotta Gnocchi
Ingredients: 2 Pounds red beets (without greens), trimmed; Kosher salt and freshly ground black pepper; 2 Teaspoons extra-virgin olive oil; ¼ Cup water; 1 egg; 1 Cup whole-milk ricotta cheese, homemade or store-bought; 1 Cup finely grated Parmigiano-Reggiano cheese; Freshly grated nutmeg; 3 Cups all-purpose flour, plus more for dusting; Semolina flour, for dusting; Sauce of your choice, for serving