Found a small fast food chain in Kampala named 2K that serves only Ugandan food:
they have 3-4 locations, all in Kampala.
Standard fast food counter service/ordering, with dine in tables:
your food is brought to you by one of the staff when it's ready, which is about 4-5 minutes after ordering. I went with "goat mpombo with food", which is a luwombo (meat stew/soup) variant:
and includes a bunch of side veggies / starches (the "food").
Here's the goods:
that's a passionfruit juice on the left. The goat mpombo is cooked (and arrived in) the banana leaves in the upper right. I wasn't fast enough to get a photo before the person bringing the food emptied the goat from the banana leaves into the steel bowl, but that's where it came from.
Close up of "the food":
That's shredded carrot / cabbage / tomatoes on the right, along with some avocado chunks. To the left of that is spicy potatoes, then rice with additional roasted goat meat, then some matooke, cassava, arrowroot, and a couple other things I don't know. I ate them all, tho.
And the goat mpombo itself:
incredibly tender goat that gets steam slow cooked for hours in the banana leaves. You give it a stern look and it falls right off the bone.
Total price: $6.75
Heading to Kigali, Rwanda next week. Haven't found any local fast food chains there yet but haven't looked very much. This one will be difficult to top.