Brown ground beef and drain. Mix in taco mix and water. Pour into 12 x 6 rectangle pan or 2-3 casserole dishes and spread evenly. Pour tomatoes, onions and jalapenos evenly over ground beef. Soften and mix together cream cheese, sour cream and dry ranch dressing mix. Evenly pour mixture over vegetables. Pour taco sauce over all and cover with tin foil. Bake at 350 degrees for 25 minutes until bubbly. Remove foil and sprinkle sharp cheddar cheese over top and let melt. Remove from oven and let set for 15 minutes. Serve warm, not hot, with taco chips.

This can be made ahead and refrigerated--just reheat when needed.