Add all of the prepared vegetables to a large mixing bowl, and toss to combine, making sure to break up any clumps of zucchini.
In a separate bowl, mix flour, baking powder, remaining salt, pepper, granulated garlic (or Cajun seasoning, if using), breadcrumb and cheese together. Sprinkle over the vegetables, then toss to combine, until the vegetables are well coated with flour mixture. (I like to use a flexible rubber spatula for this.)
Crack eggs into a small bowl, give a little whisk and pour over vegetable mixture. Mix to THOROUGHLY combine.
Heat a sauté pan (skillet), or cast iron pan, over medium-high heat, add a drizzle of oil (a teaspoon or two) and swirl to coat the bottom of the pan.
Using a scoop (or a large spoon), drop mixture into the hot pan and flatten out with your fingers, or a spatula, to form a patty.
Cook for 5 - 6 minutes on each side, turning down the heat if they begin to brown too quickly.
Remove from pan to a cooling rack placed inside a sheet pan, or a paper towel lined baking sheet. Repeat until you've used all of the vegetable mixture.
Store leftover veggie cakes in an airtight container in the fridge for up to 5 days, or in the freezer for up to 3 months.