You did the right thing by eating it. As Christ told the Apostles before he sent them out, "Eat whatever is set before you."
Many years ago I went to visit my (non-Orthodox) grandparents on Good Friday once while I was on leave from the military. My grandpa was out shopping and my grandma called to tell him I was there. He showed up a few minutes later with a hamburger he'd bought me from Burger King. I was only recently chrismated, and very concerned with the letter of the law. But I knew that buying me that burger was a big deal for my grandparents, and it would be sinful to refuse it. I can't stand Burger King, so I thanked him, choked it down, and pretended to enjoy it.
When I told my priest about it he started laughing and said "You did the right thing, don't refuse hospitality." Fasting is there to remind you that your food is a gift from God and to teach you self-restraint; letting your fast become a difficulty for people around you is the vegan SJW way, not the Christian way.