Okinawan Purple Sweet Potato Stew with Tofu

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

A hearty, naturally sweet stew blending Okinawa's signature purple sweet potato with silken tofu in a light miso broth. This asian-inspired vegetarian ready in about 30 minutes pairs Okinawan purple sweet potato, silken tofu, dashi stock for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 220 calories and feeds 2, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 15 min Serves 2 Asian cuisine 220 cal/serving
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Ingredients

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Instructions

  1. Step 1: Peel and dice 150g purple sweet potato into 1/2-inch cubes. Simmer in 300ml dashi stock over medium heat for 12 minutes until tender but not falling apart.
  2. Step 2: Add 150g cubed silken tofu to the pot and gently stir; cook for 3 more minutes until tofu is warmed through.
  3. Step 3: Whisk 2 tbsp white miso paste with 2 tbsp warm dashi stock until smooth, then stir into the pot. Simmer gently for 2 minutes without boiling to preserve the miso's flavor.
  4. Step 4: Stir in 10g rehydrated wakame seaweed and cook for 1 minute until slightly softened.
  5. Step 5: Remove from heat and garnish with 2 sliced green onions. Serve hot in bowls.

Frequently asked questions

How long does Okinawan Purple Sweet Potato Stew with Tofu take to make?

Total time is about 30 minutes (15 min prep + 15 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Okinawan Purple Sweet Potato Stew with Tofu?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep okinawan purple sweet potato from drying out.

Can I substitute ingredients in Okinawan Purple Sweet Potato Stew with Tofu?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Okinawan Purple Sweet Potato Stew with Tofu for a different number of people?

The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Okinawan Purple Sweet Potato Stew with Tofu?

Asian vegetarian like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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