Before Okinawa became westernised, before KFC arrived on the island and longevity rates began to fall, traditional Okinawans ate purple sweet potato — imo — at nearly every meal. It provided roughly 60% of their daily calories. Champuru is their word for stir-fry — a flexible technique applied to whatever the garden offers. This version is close to the traditional combination: sweet purple potato, silken tofu, bitter melon or courgette, and egg scrambled through at the end.
The Ingredients
- 2 medium (400g)Purple sweet potatoes, peeled and diced 1.5cm
- 200g (7oz)Firm tofu, pressed and torn into chunks
- ½Bitter melon (goya), seeded and thinly sliced — or substitute courgette
- 2Eggs, lightly beaten
- 2 tbspSesame oil
- 1 tbspSoy sauce or tamari
- 1 tspDashi powder or ¼ tsp salt
- To finishSpring onions, sliced
How to Make It
Heat 1 tbsp sesame oil in a large wok or heavy skillet over medium-high heat. Add the sweet potato dice in a single layer and cook for 6–7 minutes, turning occasionally, until tender throughout and developing some golden colour on the edges.
Push the potato to the pan edges. Add the remaining sesame oil to the centre. Add the torn tofu and press lightly — you want some browning on the surface. Cook 2 minutes, then add the bitter melon or courgette and stir everything together for 2 more minutes until the vegetables are just tender.
Pour the beaten egg over the whole pan and stir gently but consistently until just set — about 60 seconds. Don't overcook; the egg should remain soft.
Add the soy sauce and dashi powder. Toss to coat. Taste — it should be savoury, slightly sweet from the potato, and pleasantly bitter if using goya. Serve immediately over brown rice if desired, topped with spring onions.
Tips
- Purple sweet potato: Available at Asian supermarkets. Regular orange sweet potato can be substituted — still nutritious, though lower in the specific anthocyanins that give the purple variety its exceptional antioxidant properties.
- Bitter melon: Genuinely bitter and an acquired taste. If using it, salt the slices for 10 minutes then rinse before cooking — this reduces the bitterness slightly. Courgette is a mild, delicious substitute.
- Tofu texture: Press firm tofu for 15 minutes before cooking by wrapping in a clean cloth and weighting it. This removes moisture and allows the tofu to brown rather than steam.
- Hara hachi bu: Eat until 80% full. This is the Okinawan practice — portion mindfully, eat slowly, and stop before discomfort. The food will provide more than enough.