Ingredients:
- 2 tablespoons coarse sea salt or kosher salt, plus more for serving
- 1 1/2 cups orzo
- 3 tablespoons unsalted butter
- 1 pound red mustard greens, chopped (green mustard, baby spinach, or mild arugula may be substituted)
- Grated zest of 1 lemon
- Freshly ground black pepper
- 1 cup freshly grated Asiago cheese, for garnish
