Luigi's of Parnell Street ??
is that Luigi's of Parnell Street across the road from the railway station in Limerick. personally I think fusco's in garryowen do better chips.
If you walk a 100 yards further up the road from Luigi's to Wickham Street you can get DELICIOUS homemade Sweet Potato and Coconut Soup which has a real kick in it. It's a small takeaway sandwich bar. But this soup is THE BUSINESS. Occasionally they have slices of chicken breast in it. Check it out if you're in the locality. It really warms you up.
"peasant" french grub is really good but almost impossible to find. there was a place in Patrick Street, Limerick a few years ago.
with all the east european immigrants there should be some polish or latvian cafes / restaurants but haven't come across any. the Polish beegos is excellent.