Preheat cast iron grill plate to 375F (Traeger Ranger), alternatively the grill to 400F.
Lightly salt the grated zucchini and let sit for 8-10 minutes to draw out some of the water.
Squeeze the zucchini until most of the moisture has been removed and then place in a large mixing bowl with the other ingredients.
Use a fork to combine the ingredients, adding additional semolina flour if mixture is too wet.
Drizzle cast iron plate or a sheet pan with the oil.
Using a portion scoop or spoons, form into golf ball size portions and place directly onto preheated cast iron grill plate and cook for 3-4 minutes per side pressing down lightly to form a cake.
Cook until golden brown.
Alternatively place onto oiled sheet pan and bake for 12-18 minutes, turning half way through.