Rinse the quinoa, rice, and urad dal separately under cold water.
Soak the quinoa, rice, and urad dal in enough water for 4-6 hours or overnight.
After soaking, drain the water and grind the quinoa, rice, and urad dal together to form a smooth batter. Add water as needed to achieve the desired consistency. The batter should be slightly thick, similar to dosa batter.
Transfer the batter to a large bowl and add salt. Mix well and let it ferment for 6-8 hours or overnight.
After fermentation, the batter should have a slight sour smell and be slightly bubbly.
In a separate mixing bowl, combine the grated carrot, chopped onion, chopped green chilies, cumin seeds, curry leaves, coriander leaves, and grated ginger (if using). Mix these ingredients well.
Add the vegetable mixture to the fermented batter and mix thoroughly. Adjust the consistency with water if needed.
Optionally, add rice flour to make the batter a bit crispy. Mix well.
Heat an appe pan and add a few drops of oil into each mold.
Spoon the batter into each mold, filling them up to three-fourths full.
Cook on medium heat until the bottom of the appe turns golden brown. Use a skewer or spoon to flip them over and cook the other side until it's also golden brown.
Repeat the process until all the batter is used.
Serve the quinoa appes hot with coconut chutney or your favorite dip.