1Cook pasta as directed, drain, return to pot. Heat oil in lg skillet over medium heat. Add onion & garlic, cook 2 minutes, stirring constantly. Stir in tomatoes w/ their juices, parlsy and lemon juice, cook, stirring for 1 min. Add red pepper flakes. Reduce heat to med-low, cook 3-5 min or until sauce thickens, stirring often. Gently stir in flaked tuna, heat through. Add pasta to sauce, toss gently to coat and heat through.