Preheat the oven to 200°C/400°F. Line a baking tray with parchment or a non-stick silicone mat.
Mix the egg and water and place in a shallow dish. Place the grated parmesan in another shallow dish.
Roll the carrot batons in the egg, then in the parmesan. Arrange on the baking tray so the carrots aren’t touching. Sprinkle on the salt and pepper and place in the oven for 15-20 minutes, turning once until dark golden brown.
Remove the carrots from the oven and arrange on a plate or board. Top the carrots with the sour cream and salsa, then arrange the avocado slices and chunks, red onion slices, red chilli slices and fresh coriander on top. Serve immediately.