Sauté chicken, pancetta, shallots and garlic in a skillet over medium heat for about 10 minutes or until chicken and pancetta are cooked through. Remove from skillet and keep warm. Melt butter in same skillet over medium heat. When butter begins to foam, cook for 1 minute more until golden brown, being careful not to burn. Add chicken mixture, tomatoes and cooked pasta to skillet; cook for a minute more to heat through. Season to taste with salt and pepper. Stir in arugula, Kerrygold Dubliner® Cheese and pine nuts and toss lightly.