1. Polenta is derived from corn (maize). It is grainy and looks similar in texture like fine semolina (rawa). Simply put, polenta is the rawa made out of corn.
2. This cake is pretty lemony in taste. I used just 1/4 cup of juice (extracted from 1 whole lemon) for the syrup. The original recipe asked for the juice and zest of 2 lemons which would be approx 1/2 cup of juice which can be too sour. If you want a mild taste of lemon then I suggest you use the zest and juice of only 1 lemon (as per my recipe).
3. If you are using Indian lemons the size of table tennis balls then try using two for every lemon mentioned in the recipe.