Preheat the oven to 350ºF. Spread the walnuts on a baking sheet and toast until fragrant and lightly browned, about 10 minutes. Let cool, then chop coarsely. Heat 2 tablespoons of the olive oil in a small skillet over moderately high heat. Add the garlic and sauté until light brown. Scrape the garlic into a mortar or food processor and add the basil and nuts. Pound to a paste or process until finely chopped. Add the ricotta, the remaining 3 tablespoons oil, and the lemon zest, and pound or process until thoroughly blended. Transfer to a bowl and stir in the pecorino cheese and salt and pepper to taste. |