Nice list. I've been to most multiple times and there's not a bad one in the bunch. I'll go through your list in order, trying not to add too many places. Mostly, I'll try to help pare down your list, giving you reasons why you might want to save certain places for another day.
La Favorita — I haven't visited.
Los Gallos 2 — It's been too long since my last bowl, but they've always set the standard for carne en su jugo. Maybe not an essential stop, but close.
Garifuna Flava — With so few Garifuna restaurants in the world, it would be a shame to miss it. Hopefully they'll have some interesting weekend specials (not that there isn't enough on the regular menu).
Ms Lee's — It would be tough to pass up Birda's herbal chicken (I imagine it would reheat well for Monday's lunch), but maybe just pick up a dessert for later?
Mini Hut — Good chicken, but it doesn't strike me as unique in any way. If you're a fried chicken fan and want to check it off your list, by all means go for it.
Grand Duke's — Nothing else quite like it in Chicago. Cool interior, heavy food. Maybe just sit at the bar for a draft Svyturys and the "Enjoy it with Beer" platter (smoked pig ears, fried bread, etc)? Definitely check out their deli next door.
Lem's — The definitive Chicago barbecue house, not as consistent as it should be, but still well worth a visit. Go across the street to Brown Sugar for a slice of Stephanie's superlative caramel cake. Cathy2's suggestion of Honey 1 would be great too (more consistent, though less picturesque).
Q Sazon — I haven't visited.
Vito & Nick's — I've been going for many years and still love it. Surprisingly easy pizza to eat, even when full (so it wouldn't be a bad later stop). Go a few blocks south to admire Rosario's remarkable neon sign and pick up some excellent fresh Italian sausage (you will have a cooler, won't you?).
St Rest — No small plates here; this might bury you. I might like Morrison's on Ashland a little more, but it's a close call. But any soul food stop might not be ideal for a day like you're planning.
Dat Donut — Good donuts, fairly priced. Why not pick up a few for later? Simpler is often better at Dat.
Hienie's — Worth visiting, if only so you can try their oddball hot sauce in its native habitat. If you're on the SE Side, you ought to get some smoked fish at Calumet Fisheries. And browse the fascinating La Fruteria for kola nuts, djon djon mushrooms, pickled pig tails and Hienie's hot sauce (by the gallon or single-serve cup).
Burritos Juarez — Their burritos are good, small, fast and cheap, but I'd go with Jefe's suggestion of La Placita de Durango for a more interesting selection of Duranguense food, including handmade wheat or corn gorditas stuffed with chicharron prensado, cuajada, requeson or some great guisos.
Al Bawadi — Wonderful place, but as Jefe points out maybe not ideal for a snack. The gratis appetizer plate alone might be all you want, but then you'll feel obligated to order a full meal. If you go, check out Nut House across the street for excellent lokum and several za'atar mixes.
Nablus Sweets — A mammoth slice of their top-notch, ultra-rich knafeh would surely finish your day (and after a deep-fried Jim Shoe it might finish your life).
BR wrote:Don't forget there's Cremería La Ordeña #2 on the north side, on Lawrence (between Kimball & Pulaski).
True, but I much prefer the lively, jam-packed atmosphere at the original.