Cook pasta according to package directions; drain and set aside.
Heat olive oil in a large skillet over medium- high heat. Coat chicken breasts in seasoning and place in preheated skillet, cooking for 5- 6 minutes on each side or until cooked through. Remove chicken from skillet and set aside.
Melt in butter in the same skillet and add garlic and cook, stirring continuously, for 1 minute. Mix in flour and cook for an additional 1-2 minutes, or until it turns light golden brown.
Slowly stir in chicken broth, milk, lemon zest, parmesan, salt and pepper then cook, stirring continuously, for 3 minutes or until thickened.
Remove from heat, add pasta and toss until evenly coated in sauce. Slice chicken and place on top of pasta and garnish with diced tomatoes and parsley.