It may not be known for food or sweets, in that it does not have it's own cuisine but I'm here to tell you, I've been all over the world and had some of the best food there. Butter is big, cheese is big, seafood is big, really good meat and produce that taste amazing. I don't know how you stretch your budget for food, but there are several Michelin rated restaurants there, lots of sauces. Bread may be an acquired taste as soda and Brown unleavened is big. but every morning Irish brown bread with butter and smoked salmon was breakfast. Desserts I'll just let you sort of for yourself but pretty spectacular. I'm not big on sugar but i was tempted a few times. By the way they are big breakfast eaters, and i love a good full Monty (heavy heavy meat eaters and a full Irish breakfast is served as part of the price of a hotel night stay) which is why this was the meal i most needed to avoid but in reality a bite of everything on the plate is probably about all you could eat (fully aware I'm making assumptions about your capacity but it was true for me)
If i had advice it would be because our capacity is so small and i was there last year for 5 months, i saved my calories for the evening meal. In Ireland much like the drinking, it's not eating or drinking it's a real social occasion. The other problem you may run into is that an evening meal if you meet people can take place over a number of hours and of course this is a problem for us. We may not be able to get a lot in at once but over a long stretch with drinking, it changes the lay of the land. Be on the lookout for this.
I had breakfast as above, a really light lunch couple shrimp maybe, although i searched could not find a Greek yogurt with low enough sugar, so i had brought quest bars and then in the evening i had what i wanted mostly but it was always an appetizer and wine and alcohol. I didn't gain, but i didn't lose. If i ate something off plan early in the day then i changed my strategy for the evening, I had great food but i was there a long time and so had to figure out a way to weather it.
I didn't do potatoes but only because they are almost never with an appetizer and also i just did't have the capacity. I was about 9 months out when i went there, so probably at the same point you'll be. I've never been a beer drinker so that was fine.
I did split an odd fish and chips with 3 people because i could eat so little but it's so above and beyond any fish and chip you've ever had in America that it may be worth it to you, it was to me.
But for a vacation of a lifetime and just a week, I'd say basics before and basics after. The big thing i find about vacations is that you have to stop them when they stop and not get caught up in the tomorrow syndrome.
Enjoy