Cheat-Day Penne | Recipe Reader

Ingredients

• 8 ounces penne pasta
• 2 tablespoons unsalted butter, can substitute extra-virgin olive oil
• 8 ounces asparagus, trimmed, cut into 2-inch pieces
• 1 large shallot, thinly sliced into rounds
• 2 cloves garlic, thinly sliced
• 1 lemon, finely zested, divided
• salt, to taste
• ground black pepper, to taste
• 1 (5.3-ounce) container plain Greek yogurt
• 1 cup feta cheese, crumbled into small pieces
• 3 tablespoons fresh dill, chopped, divided
• 1/4 cup walnuts, toasted, coarsely chopped, for serving