You can buy handva / ondhawa flour mix from the store, or there are instant packets (Gits & other brands). Good with or without grated / minced vegetables. You can substitute semolina or idli batter for a quick fix, but the taste and texture will be slightly different.
Of late, instead of baking, I’ve been cooking it stovetop in a small frying pan, flipping it when it’s 80% done (like a Spanish tortilla). For me, the tempering and the crust are the best parts, and the crust gets maximized this way!
