Zucchini and Tuna Pappardelle

INGREDIENTS

• 3/4 lb dried pappardelle pasta
• 1 tablespoon butter
• 4 shallots, thinly sliced or 1/4 cup finely chopped red onion
• 1/2 teaspoon kosher salt
• 1/4 teaspoon ground black pepper
• 1/2 cup dry white wine
• 1/2 cup chicken broth or 1/2 cup vegetable broth
• 2/3 cup heavy cream
• 1 cup frozen peas
• 1/2 cup grated parmesan cheese
• 2 (5 ounce) cans tuna, drained
• 1 lb zucchini, about 3
• 1/4 cup chopped chives (optional)
• 3 tablespoons lemon juice
• 2 tablespoons grated parmesan cheese
• additional salt and pepper, to taste