Spring Vegetable and Potato Frittata

Bahan-bahan (4 porsi)

• 8 large eggs, (beaten)
• ¼ cup grated Parmesan cheese
• 3 tablespoons chopped fresh Italian flat-leaf parsley
• 1 teaspoon kosher salt, (divided)
• ¼ teaspoon freshly ground black pepper, (divided)
• ⅛ teaspoon cayenne pepper
• 3 tablespoons extra-virgin olive oil, (divided)
• 1 medium (about ½ pound) Yukon Gold potato, (scrubbed and diced)
• 1 medium yellow onion, (thinly sliced)
• ½ pound asparagus, (trimmed and cut on the diagonal into 1-inch pieces)
• 3 medium garlic cloves, (minced)
• 6 ounces (about 1¾ cups) shredded sharp cheddar cheese