Heat the oil in a large shallow frying pan (I used a crpe pan). Add diced shallots
As soon as the shallots get translucent, add peas. Fry for about a minute
In the meantime, whisk the eggs with salt, pepper and mustard. Season to taste
Pour the egg mixture over the vegetables. Stir to distribute evenly, then let it set
At this point, you can either put the mixture in the oven (if you have an ovenproof pan) or continue cooking it on the stove. If you choose the latter, cover the pan with a lid so you won't need to flip the fritatta
Scatter diced cheese on top and let it melt while the fritatta cooks (mine took roughly 15min) over low heat (your lowest setting)
Then simply serve warm or cold. Enjoy :)
