In 10-inch nonstick skillet, mix uncooked noodles and sauce mix (from Hamburger Helper box), milk, hot water, lemon juice and dill weed. Heat to boiling, stirring occasionally. Reduce heat; cover and simmer about 10 minutes, stirring occasionally, until noodles are tender.
Stir in broccoli and chicken; cook 2 to 3 minutes longer or until broccoli and chicken are hot. Remove from heat.
Cover; let stand 5 minutes (sauce will thicken as it stands). Top with lemon slices.