I have a few more suggestions for the Byward Market and centretown:
The Red Apron has a lot of prepared meals however they require heating up. I’m not sure if you have access to a microwave but I’m just putting it out there… They have a lunch counter from Monday to Friday and you can either eat in or take out. Their hot lunches are given to you hot so you don’t have to reheat them. The only menu item I didn’t like was the lobster sandwich since it had no flavour but I have been very happy with everything else I have ordered from them. The meals are available for take out but they also have a patio if you would like to sit outside. There is no indoor dining.
Subito Sandwiches is across the street from the Red Apron and just as the name implies they specialize in sandwiches. The sandwiches are huge and tasty. So far I have been very happy with the sandwiches I’ve ordered. They are take out only.
Talay Thai is also good. You could dine in or take out.
If you like Filipino food (or if you haven’t and would like to try it) I could recommend Tamis. Their bulalo is my favourite dish. They are open for dining in and take out.
Island Grill has good Carribean food. I’ve only had their curries but they are all good. They are only open for take out.
If you like pizza the Colonnade is good. It’s also a popular spot with the locals. Their Mediterranean pizza is my favourite. They are open for dine in and take out.
Mama Teresa serves good Italian food. They are open for dining in and take out.
East India Company has good Indian food. They used to have a buffet although it closed when covid started and I’m not sure if it has re-opened. They have an a la carte menu though and they are open for dining in and take out.
I know you said you have already been to La Bottega so maybe you are familiar with the sandwich counter? If you decide to order a sandwich the only place to eat it is at one of their tables outside. But they have a dining room at the back of the store where hot meals are available. I haven’t tried it yet but it seems to be popular. It is open for dining in only.
Pili Pili offers Caribbean style bbq’d chicken. I usually order a chicken platter which comes with a salad on the side and the platters are very good. They are open for dining in and take out.
Ahora serves Mexican food and you can dine in or get take out.
Le Mien serves Chinese style soups and they are REALLY good - highly recommended! They make their noodles in-house. They offer dining in and take out.
Shanghai Wonton Noodle is another favourite. Their pork and peanut noodle dish is a favourite. They offer dining in and take out.
Khao Thai specializes in Thai food and you can dine in or get take out.
Chez Lucien is a brasserie in the market. You can dine in but I’m not sure if they do take out.
There is also Cafe Shafali if you like Indian food. You can dine in or get take out.
Kochin Kitchen is also highly recommended and probably the most authentic Indian restaurant in the area. You can dine in but I’m not sure about take out.
And I’m just putting in a plug for my favourite Chinese restaurant Yang Sheng Apparently they are on vacation until October 17 If you do choose to eat there you can dine in or get take out/delivery. They are located in Chinatown.
Let me know if you would like recommendations in other neighbourhoods…