Hint: if you want to eat a gluten-free vegie burger, do not do as  girliejones did and eat this with bread. Not even gluten-free bread, because gluten-free bread is horrible.

1 big/2 small sweet potatoes
1 packet of frozen spinach
1 can of chickpeas
1 tsp curry powder
potato flour, for rolling

Dice sweet potato & steam until soft. Thaw spinach. Drain liquid from chickpeas. Put all ingredients in a bowl and puree roughly (having some pieces of chickpea/potato still whole is desired).

Roll large balls of mixture in potato flour and refrigerate for at least an hour.

Grill/bbq/fry burgers, pressing them as flat as desired during the process.

YUM