Pasta with Asparagus and Lemon Sauce

Ingredients (13)

• + 2 lemons add to pantry
• + 1 (16 ounce) box penne pasta add to pantry
• + 5 tablespoons butter, divided add to pantry
• ✓ ¾ pound asparagus, trimmed and cut into 1-inch pieces
• + salt and freshly ground black pepper to taste add to pantry
• + salt and freshly ground black pepper to taste add to pantry
• + 3 tablespoons all-purpose flour add to pantry
• + ¾ cup heavy cream add to pantry
• + 1 ½ cups vegetable broth, or more to taste add to pantry
• + 4 sprigs fresh parsley, chopped add to pantry
• + 1 pinch white sugar, or to taste add to pantry
• + 2 ripe tomatoes, seeded and diced add to pantry
• + ½ cup freshly shaved Parmesan cheese add to pantry