Top tips

• Sift in the chickpea flour to avoid any lumps that could be hard to get rid of once you start adding water to the batter. Don't skip this step! Also add water slowly to avoid any clumping.
• You can make the chilla as thick or thin as you want by adjusting the quantity of water in the batter, but don't overdo it. When you add besan mixed in water to a hot medium, the starches in the lentils bind with the water and firm up as they are heated. This ensures that your chilla will be easy to flip. But adding too much water can create a batter that will not bind. I needed 1 ½ cups of water for this batter, which makes moderately thin chillas. You can add up to ½ cup more, but probably not more than that. The batter should be of pourable consistency and thinner than a regular pancake batter.
• When adding veggies to the chilla, use veggies that cook quickly, like finely chopped greens, bell peppers, green beans, carrots, beets, cabbage and cauliflower. If you use vegetables that express too much liquid, like summer squash, mushrooms and tomatoes, make sure you give enough time for the ingredients to sit around after they are mixed so the veggies express their liquids before you add water.
• Mint and cilantro are amazing with the rest of the flavors in a besan chilla. Use one or the other or both! Or use another savory herb, like rosemary or sage (use less because these are stronger herbs).