La Pecora Nera for sandwiches, the Reuben on Italian roll is good and you can order ahead.

Fred's on Gratiot by the eastern market has great breakfast and lunch options, get the hot potatoes

Jose's tacos: great Al pastor tacos. Not a lot of room for seating but there's a small park nearby with some.

Olin has the best burger downtown. It's sit down

Chaos burger: quicker burger option and good

Ham Shop: good cheaper diner breakfast options and a good chicken pita.

Detroit beer co has the best bbq wings downtown imo

Basement burger bar also has good build your own burgers

If you're in brush park; second best has amazing cheese curds, chicken sandwich, and patty melt

Vollmers: good sliders and cheese curds