1In 12-inch skillet, heat milk, hot water, butter, contents of uncooked pasta and sauce mix pouches (from Tuna Helper box), carrots and tuna to boiling over high heat, stirring occasionally.
2Reduce heat. Cover; simmer 5 minutes, stirring occasionally.
3Stir in broccoli and mushrooms. Cover; simmer about 5 minutes or until vegetables are tender. Remove from heat; let stand covered 5 minutes (sauce will thicken as it stands).