اللَّهُ نُورُ السَّمَوَاتِ وَالأَرْضِ مَثَلُ نُورِهِ كَمِشْكَاةٍ فِيهَا مِصْبَاحٌ الْمِصْبَاحُ فِي زُجَاجَةٍ الزُّجَاجَةُ كَأَنَّهَا كَوْكَبٌ دُرِّيٌّ يُوقَدُ مِن شَجَرَةٍ مُّبَارَكَةٍ زَيْتُونِةٍ لاَّ شَرْقِيَّةٍ وَلا غَرْبِيَّةٍ يَكَادُ زَيْتُهَا يُضِيءُ وَلَوْ لَمْ تَمْسَسْهُ نَارٌ نُّورٌ عَلَى نُورٍ يَهْدِي اللَّهُ لِنُورِهِ مَن يَشَاء وَيَضْرِبُ اللَّهُ الأَمْثَالَ لِلنَّاسِ وَاللَّهُ بِكُلِّ شَيْءٍ عَلِيمٌ

Allah is the Light of the heavens and the earth. The similitude of His light is as a niche wherein is a lamp. The lamp is in a glass. The glass is as it were a shining star. (This lamp is) kindled from a blessed tree, an olive neither of the East nor of the West, whose oil would almost glow forth (of itself) though no fire touched it. Light upon light, Allah Guides unto His light whom He Wills. And Allah Speaks to mankind in allegories, for Allah is Knower of all things.

Cooking / Frying in Olive Oil

Some of our friends have heard from the doctors that olive oil should be eaten as RAW & it is not good for cooking OR frying. We always cook the curries in olive oil, & we have no doubts for that, as the olive oil takes its accreditation from Quran & Hadith. In Quran, Allah Exemplified His Noor with the olive tree, furthermore, the following Hadith do not mention the name of Olive, rather they quote the words "OIL produced by a blessed tree" which means that the only oil recommended by our beloved Prophet Muhammad Sallallaho Alaihe Wasallam is OLIVE OIL, either for massaging or eating, and it can be eaten as raw or used for cooking & frying.

‏يُوقَدُ مِن شَجَرَةٍ مُّبَارَكَةٍ زَيْتُونَةٍ لا شَرْقِيَّةٍ وَلاَ غَرْبِيَّةٍ يَكَادُ زَيْتُهَا يُضِىءُ وَلَوْ لَمْ تَمْسَسْهُ نَارٌ‏‏

"Lit from a blessed tree, on olive, neither of the east (i.e. neither it gets sun rays only in the morning) nor of the west (i.e. nor it gets sun rays only in the afternoon. but it is exposed to the sun all day long), whose oil would almost glow forth (of itself), though no fire touched it". (24:35)

وفى الترمذىِّ وابن ماجه من حديث أبى هريرة رضى الله عنه، عن النبىِّ صلى الله عليه وسلم أنه قال‏:‏ ‏(‏كُلُوا الزَّيتَ وادَّهِنُوا به، فإنَّه من شَجَرَةٍ مُبَارَكةٍ‏)‏‏.‏

Tirmizi and Ibn Majah narrated that Abu Hurairah Radi Allaho Anh related from Prophet Muhammad Sallallaho Alaihe Wasallam that he said: "Eat the oil, and use it as an ointment, because it is produced by a blessed tree".

وللبَيْهَقِى وابن ماجه أيضاً‏:‏ عن ابن عمر رضى الله عنه، قال‏:‏ قال رسول الله صلى الله عليه وسلم‏:‏ ‏(‏ائْتَدِمُوا بالزَّيتِ، وادَّهِنُوا به، فإنه من شَجَرَةٍ مُبَارَكةٍ‏)‏‏.‏

Al-Bayhaqi and Ibn Majah also narrated that Abdullah bin Umar Radi Allaho Anh reported that Messenger of Allah Sallallaho Alaihe Wasallam said: "Use the oil as a curry (or in your curries) and apply it as on ointment (for massaging) because it is from a blessed tree (olive tree)".

We cook our curries in olive oil & it is a surprise that the blessed oil increases digestibility, a special case was Cruciferous vegetables like Broccoli, Cauliflower & cabbage, curries of all these create burping / belching, but when they were cooked in olive oil, burping / belching never appeared, Masha'Allah, the magnificent oil fixed the problem & the curry was so easy to digest. 

And to provide some references from the research of WEST, the following stuff will be sufficient for you Insha'Allah. (artciles from the website of Olive Oil Source)

Heating Olive Oil

Heating Olive Oil and Smoke Point

Myths about Cooking with Olive Oil