Toss the grated zucchini with a teaspoon of salt and set it aside in a colander while preparing the rest of the ingredients. Then rinse the zucchini and squeeze out as much moisture as you can.
Toss the zucchini with the eggs, chives, garlic, parsley, marjoram and lemon zest. Stir in the bread crumbs along with the pine nuts and capers. To check the seasonings, fry a dab of the mixture, then taste it for salt and pepper, and season the batter accordingly.
Put a very thin layer of olive oil into a skillet. (I use two skillets so I cook them faster.) When hot, add the batter in 1/2 cup measures. Spread the batter out a bit and cook over medium heat until golden. You can also make smaller individual cakes using less batter for each skillet cake. When one side is golden, turn and cook the second side. Serve right away or keep warm in the oven until all are done.
Top with halved cherry or grape tomatoes, if desired.