Spring Pea and Asparagus Pasta

Name: Spring Pea and Asparagus Pasta
Ingredients: 1 pound Medium Pasta Shells; 4 Tablespoons Olive Oil, Plus More For Drizzling; 5 Shallots, Quartered Lengthwise And Thinly Sliced Widthwise; 1 pound Asparagus, Ends Snapped Off, Chopped Into 1/2-inch Pieces; 2 teaspoons Minced Garlic; 2 cups Sweet Peas; ⅔ cups Parmesan Cheese, Plus More For Sprinkling; 2 Tablespoons Butter; 2 teaspoons Grated Lemon Zest; 1 whole Lemon, Juiced; 1 cup Chopped Fresh Herbs; ¾ cups Roasted Sunflower Seeds (preferably Unsalted); Salt And Pepper, to taste