Combine the remaining salsa and water. Pour over the top of the casserole.
Cover and bake 1 hour or until heated through.
Top with sour cream, remaining 1 cup of cheese, olives, onions, tomatoes if desired.
Bake, uncovered, for 5 minutes or until the cheese is melted.
Let stand 10-15 minutes before cutting and serving for clean slices.
The calories shown are based on the recipe being cut into 15 pieces, with 1 serving being piece of lasagna. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. **We are not dietitians and recommend you seek a nutritionist for exact nutritional information.**