My quiche/flan has turned out 'gritty'what have I done wrong?? Any cooking experts out there?!

[notflorencenightingale]

Made a flan today using bought pastry, put in it eggs, cream, spinach (cooked) salt and pepper. It tastes lovely but it has a really gritty horrible texture, I just cannt understand what i have done wrong, its bad enough to not want to eat it! All utensils etc were clean etc 9I always check) so am mystified, but maybe I have made a simple mistake as i dont normally make flans etc.

Anyone who can help me solve the mystery I would be grateful!!

did you whisk or beat the egg mixture?

it's the spinach! spinach is very gritty sometimes unless you really wash it well.

Did you put grit in?

Hi Toys I only beat the mixture rather lazily I might add, but interseting about the spinach, it was out of a bag from tescos
and I didnt wash it- must be that!!