Spread grated zucchini and sweet potato onto some paper towels and pat dry, trying to remove as much moisture as possible. Let them sit out for about 10 minutes to further dry.
Add all ingredients to a large bowl (except the coconut oil) and mix thoroughly.
Add 2 tablespoons of coconut or olive oil to a skillet or frying pan on medium heat
Form 2-3cm balls of mixture with your hands and add to pan. Using a soup spoon, flatten the balls to about 5-6cm diameter discs (try to avoid the edges of each fritter touching).
Cook the fritters for 3-4 min on each side until golden brown.
Remove fritters from the pan and let drain on a paper towel-lined plate. Repeat until fritter mixture is used up.