Preheat the oven to 325°F. Line a baking sheet with foil.
In a bowl, whisk together the ghee (or butter), Worcestershire sauce, Italian seasoning, salt, and garlic powder.
1 tablespoon melted ghee, 1 tablespoon Worcestershire sauce, 2 teaspoons Italian seasoning, ¼ teaspoon Kosher salt, ¼ teaspoon garlic powder
Add the walnuts, cashews, and almonds. Mix well to ensure all the nuts are coated.
1 cup walnut halves, 1 cup cashews, 1 cup whole almonds
Spread the nuts onto the prepared baking sheet and sprinkle with the cheese.
2 tablespoons grated Pecorino Romano
Place in the oven and bake for 15 minutes, stirring every 5 minutes to ensure the nuts cook evenly.