Preheat oven to 450°F. Brown meat in large skillet on medium-high heat. Drain fat. Stir in Seasoning Mix, salsa and water. Bring to boil. Reduce heat to low; simmer 5 minutes, stirring occasionally.
Place pizza crust on baking sheet. Spoon meat mixture over crust. Sprinkle evenly with cheese.
Bake 12 to 15 minutes or until cheese is melted. Top with shredded lettuce and chopped tomato.