If you need a quick bite and aren’t afraid of grease, Sammy’s Touch (already mentioned; 5659 S Cottage Grove) is almost across the street from DuSable. A Greek fast food joint, not bad for the genre.
Also mentioned, Medici (1327 E 57th) has good burgers and pan pizza some people like a lot. Stop at Medici Bakery next door and get a loaf or two of excellent bread to take home. University Market (1333 E 57th), also part of the Medici mini-empire, makes very good sandwiches (on Medici bread), take away only.
For a nice, white-tablecloth meal, La Petite Folie (1504 E 55th) can be pretty good. They have a prix fixe early dinner that’s not a bad deal. Interesting, moderate, all-French wine list.
Valois (1518 E 53rd) is a Hyde Park classic, among Chicago’s oldest restaurants and one of the last steam table cafeterias around (“See Your Food”). Honest, stick-to-your-ribs cooking.
Just west of Washington Park is Ms Lee’s Good Food (203 E Garfield = 55th). Pretty good soul food (try the herbal chicken) and excellent desserts. Take out only.
A little south of the park is H&A Restaurant (432 E 63rd) for a full array of soul food classics, done well. Don’t miss the dinner rolls.
Almost at the corner of Cottage and 63rd is Daley’s (809 E 63rd), another of Chicago’s oldest restaurants, sort of a soul food luncheonette. The menu is a bit of a minefield but if you order well you can stuff yourself silly for under $10 (with a generous tip).
Farther south there are many choices: Barbara Ann’s for barbecue (7617 S Cottage; take out only), Tropic Island for Chicago’s best jerk chicken (1922 E 79th; mostly take out), Yassa for Senegalese (716 E 79th), Café Trindad for interesting Caribbean (557 E 75th) to name a few.
Maybe you’ll take a few minutes afterwards to let us know where you went and what you thought of it?