Beef Tacos

1 lb (1/2 kilo) ground beef
1 cup water
1 package taco seasoning mix  (approx 2-3 tbsp)
12 hard or soft taco shells
Toppings like:  shredded cheese, chopped tomato, shredded lettuce, chopped onion, salsa, chopped green onions

Brown ground beef in a non-stick skillet.  Drain.  Stir in water and seasoning mix.  Simmer uncovered for 5 -10 minutes, until slightly thickened.  Serve with warmed soft or hard taco shells.