Prepare a frying pan with half of the oil, when this has warmed
add the zucchini, onion, and peppers. Let fry over a medium heat
for 10 minutes. Then lower the temperature to the minimum and
fry for another 20 minutes stir frecuently.
Prepare another frying pan for the tomatoes. Put
in the rest of the oil and while still cool add the tomatoes
and cover so the oil does not splatter.
I will explain why you need not heat the oil before
adding the tomatoes.
The tomato contains lots of water, if the oil
is too hot it will splatter and it is better to avoid accidents
and this does not alter the flavor.
The placing of the cover is because it is inevitable
that they will splatter while frying. You must only remove the
cover once and a while to stir.
You may also use canned tomato, if they are peeled
and all natural. of course this is not the same as fresh tomatoes.
The time required for the tomatoes to fry depends
on the quality of the tomato. If they contain a lot of water
it will take longer. The cooking time is about 20 minutes beginning
with a medium heat 10 minutes and another 10 minutes over low
heat.
When the zucchini, onion, and peppers are cooked
mix them with the tomatoes and allow to fry another 3 to 4 minutes.
Once you have this all cooked pour it into a deep
dish. If you see that it has a lot of oil on the surface remove
it with a tablospoon. Keep in mind that olive oil increases
in volumn when heated while the vegetables decrease in size.