3 penne with asparagus smoked salmon and Recipes

penne or 1 lb other short pasta, asparagus, cut into 1 & 1/2 in . pieces, shallots, finely chopped, butter, half-and-half, lemon zest , julienne, grated, smoked salmon or 4 -6 oz nova lox, fresh dill, chopped divided, salt, locatelli cheese or 2 tbsp parmesan cheese

unsalted butter, extra virgin olive oil, red onion , cut into thin lengthwise slices, asparagus, cut diagonally into 1-1 1/2 inch pieces, smoked salmon , 2-3 slices, cut into 1 1/2 x 1/4-inch strips, fresh ground black pepper, penne, snipped fresh dill