For many years my wife and I ate at Julian's Bistro in Trenton, a very nice Polish restaurant. Sdaly, Julian's is no more and its replacement is no good.
Lately we have been frequent diners at Villa Polonia (at the corner of Mulberry and Brunswick Avenues). The food is wonderful, the service friendly and the prices more than fair. Most of the clientele is Polish.
Their soups are a treat. I have had sour soup, pickle soup, mushroom soup, borscht, tripe soup and others that I can't recall and they are all flavorful and hearty. The portion is large and the price is low.
The main dishes include many Polish specialties, again at reasonable prices.
Sometimes they have special desserts, which are basically homemade cakes. Nothing to look at, wonderful to eat. Their blintzes are different from what I am used to. Light crepes with a filling of cheese, folded in quarters. With some powdered sugar and sour cream it is blintz heaven.
Be aware that sometimes they are closed for dinner because of private paaties. It is a great restaurant.