They're also very versatile. I make the whole batch and keep them in separate bags in the freezer. The not only make fantastic burgers but I also use them as a "steak" with veggies and you can make mini one's and turn them into nuggets

Variation:
1 cup dried lentils (I've used red, green, brown and blue but green are my favourite in these)
1 cup uncooked brown rice
5 cloves garlic
1/3 cup brown sugar
1 inch ginger, peeled
2 tbsp soy sauce
1 tsp salt
1/4 tsp cayenne
Olive oil for browning