Its a desire. God will never reject anyone for this i.e satisfying their desire as long as it doesn't harm anyone, I mean to say if you had not ordered that dish some one else would have as the animal is already dead.I am saying this as a brahmin girl who has never taken non- vegetarian food and never had desire for it. But when i was kid had lot of health issues and had to take tablets having cod(fish) liver oil. So will God reject me? no. The God I believe is karuna moorthy( epitome of compassion). My suggestion is if you otherwise feel healthy, then pray to God to remove this desire from you.