centuries of culture. "But it's worth it," he said.
Perhaps thankfully for him, the food at Akoko is not quite your traditional fare. What is on offer here is an experience of the region's flavours with a fine dining twist: modern takes on traditional dishes using mostly British, sometimes French ingredients.
What Theo really brings to the table - on top of his technical skills and experience of running restaurants - is his address book full of great suppliers accrued over the years.
"Produce is my passion," he said. "Every chef says that they use the best, but how true that is most of the time, I'm not so sure."
"I'll get the best that I can, whether it comes from France, England. If it's better, then I'll get it."
The eight course, £110 tasting menu revolves around three pillars of fire, fermentation and spice, featuring dishes like Nigerian street food favourite, Suya, here made with the Lake District's finest barbecued hogget belly with spicy peanut powder; slow-cooked pigeon from Brittany with Maafe sauce, based on the Malian ground nut stew, served with cacao and pigeon jus.
Most items are fire-grilled on the Konro (including dessert), and paired with a selection of natural wines.
Theo's take on jollof rice is inspired by the many versions originating in Ghana, Nigeria, Sierra Leone, Liberia, Cameroon, The Gambia and Senegal, but isn't meant to replicate any.
As he sees it, "cooking is cooking. If you have a palate and you can balance flavours, it doesn't matter where they come from."
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Currently open for five dinners and one lunch a week, the restaurant will gradually introduce more services once the West End is once again awash with office-workers.
Like Aji, the chef has plans to take Akoko to great heights, but for now, "if we're full of happy customers, that's all I can ask for."
As he defied his mum, finding the drive, the passion and the committment to become a chef in the first place, Theo is determined to make his mark on the UK's culinary stage.
And if precedent is anything to go by, you, like his mum, should consider taking him seriously.