Combine the remaining salsa and water. Pour over the top of the casserole.
Cover with foil and bake 1 hour or until heated through and the noodles are cooked.
Top with sour cream and remaining 1 cup of cheese. Bake, uncovered, for 5-10 additional minutes or until the cheese is melted. Top with olives, onions, tomatoes if desired.
Let stand 10-15 minutes before cutting and serving for clean slices.
We find this doesn't need additional salt and pepper because of all the canned ingredients, but feel free to add as needed.
If you don't have taco seasoning, you could use a tablespoon of chili powder, a teaspoon of cumin and 2 minced garlic cloves. You can also make our homemade taco seasoning.
Store any leftovers in the fridge in an airtight container for up to 4 days.
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.**