If you can't find smoked tofu (it tends to be widely sold in Holland and Barrett but not so much in supermarkets), use a block of plain tofu and coat the strips in fajita seasoning or similar mixed spices.
I couldn't find smoked tofu anywhere, so I marinated the drained tofu strips in a mixture of sunflower oil, cumin, garlic, smoked paprika and chilli. I'm not a great fan of avocado, but this is a good way to get some into your diet. I'd make this again! - 03 Jul 2012