I would imagine mozzarella & garlic would be an excellent addition to the recipe below.

Here is a link that might be useful: Zucchini

I saw a recipe using raw, grated zucchini as a topping for hamburgers, but now can't find the recipe or know where I saw it. Anyone have anything similar?

My first reaction was "huh? What's she talking about? Grated zucchini is grated zucchini, right?" Then realized maybe there were particular herbs and spices mixed in.

Thing about grated zucchini is that it melts if left standing for any length of time. So the first step is to salt it in a colander and let is drain for at least 30 minutes. Rinse off the salt, squeeze the zucchini to remove as much additional moisture as you can.

Then use it for your topping. The possibilities are endless, from simply adding salt & pepper, to using it as a substitute for cucumber in various yoghurt sauces. Or use it as a substitute for cabbage in coleslaw.

Zucchini has little flavor of its own, but readily grabs flavors from whatever it's mixed with. So you can be pretty creative with it as a topping.

Here's one possibility:

Zucchini Raita

4 large zucchini
2 tbls salt
2 cups plain yogurt
2 garlic cloves, mashed
1 tsp ground cumin seed
2 tbls cilantro (mint or parsley can substitute)minced
1 tsp paprika
Pinch cayenne.

Peel and seed the zukes. Grate them and put in a colander. Sprinkle with the salt and mix. Let stand 30 minutes. Rinse and squeeze out the moisture.

Mix the yogurt, garlic, cumin seed and paprika in a shallow serving bowl. Add the cucumber and mix well.

Make designs on the top with the paprika and cilantro. Or just mix them in if presentation isn't important.

Re "huh?" - yes, by the word recipe I did mean other ingredients were mixed in/added.
No doubt "a simple zucchini relish" would have been a better description.

I have several recipes for summer squash relishes. But they all make large amounts, as in 6-10 pints, because they were designed to be canned.

If you can, or if you want to try and adjust quantities, let me know and I'll post recipes for you.

Boy do I have some zucchini recipes for you. Check out these two threads on the Cooking forum. Lots to choose from.

When Life Gives You Zucchini

When Life Gives You Zucchini (2)

This isn't a topping but is a very good recipe for using zucchini. Have been making it for years and have had to make it for my husband three times in the past 2 weeks.
Zucchini Casserole
3c shredded zucchini
1c Bisquick
1/2c minced onion
1clove minced garlic
1/3c veg. oil
3 large eggs, beaten
1/2c Parmesan cheese
2T parsley, minced
1 tsp seasoned salt
1/2tsp oregano
dash pepper
Mix all ingredients...pour into a 9x13" sprayed baking dish
and bake until brown and set about 45 minutes at 350°.

Does that turn into something like an impossible pie, Roselin?

Sort of but it doesn't have a bottom crust.

WOW Ann those sound good!