This was so good! What a great way to enjoy tuna & zucchini! I used half fat free mayo/half fat free plain yogurt, red onion instead of green, dried parsley & low fat mozzarella (I only used about 1 tbsp-enough for me!). I didn't use any tomato, peppers or onions & tossed the zucchini slices (I used about 8 small slices) with some salt & oregano. What an enjoyable meal! Thank u for sharing this.