Brown ground beef in skillet over medium-high heat for 5 minutes or until no longer pink; drain.

Stir in seasoning mix and salsa and water until combined. Heat until bubbly.

Place lettuce on large platter and sprinkle with cheese, tomatoes, and onions.

Spoon beef mixture into centre of the salad; spoon sour cream on top.

Arrange tortilla chips around salad and garnish with jalapeno slices, if desired.