Hole in the wall restaurants in Dublin recommendation

I'm visiting Ireland in January, and for the first night I wanna book a hotel in Dublin and walk somewhere for dinner. All the recommendations I find on Google are for fancy restaurants that serve Italian, authentic Chinese or what have you. But I'd really like a hole in the wall local restaurant that serves local cuisine. And I'd like to base the hotel off where whatever I decide.

So what's your favorite local restaurant in Dublin?