Preaheat the oven to 180 °C. Line a large tray with baking paper.
Place the zucchini into a food processor and finely grate it. Transfer the grated zucchini to a colander and squeeze out as much excess liquid as possible. Place the grated zucchini into a large bowl.
Add the pumpkin and carrot to the food processor and finely grate. Transfer the grated carrot and pumpkin to the same bowl as the zucchini.
Add the mint, feta and spring onions to the bowl and stir to mix everything through. Add the flour, breadcrumbs, eggs and salt and pepper. Stir to combine.
Form 1/4 cups of the mixture into fritters.
Heat the oil in a non-stick pan and cook the fritters in batches over medium heat. Cook for approximately 3 minutes on each side, until golden.
Transfer the cooked fritters to the prepared tray and place into the oven to cook for 10 minutes.
Stack 3 fritters on a plate, top with a poached egg, a small pile of snow pea sprouts and a slice of lemon. Season with salt and pepper.