Potato and Onion Stir-Fry with Turmeric
A vibrant Indian stir-fry featuring waxy potatoes and caramelized onions spiced with turmeric, cumin, and fresh green chilies. The potatoes cook until golden and tender while the onions soften and sweet, creating a simple vegetable side dish with warm, aromatic spices. Ready in under 30 minutes.
- Prep
- 15 min
- Cook
- 20 min
- Total
- 35 min
- Makes
- 4 servings (about 1 cup each)
Steps
Before you start
- Have all ingredients prepped and ready before you begin cooking—stir-fries move quickly
- Use waxy or red potatoes that hold their shape; avoid russets which break apart
- If your onions are very large, cut them into smaller pieces so they cook at the same rate as potatoes
Heat oil and toast spices
- Place a large wok or 12-inch skillet over medium-high heat.
- Add the vegetable oil or ghee.
- Once shimmering (about 1 minute), add the cumin seeds.
- Let them sizzle and darken slightly for about 30 seconds until fragrant.
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Ready when: Cumin seeds darken and smell nutty
Tip: Toast the cumin briefly to unlock its flavor—don't let it burn or it will taste acrid
Add potatoes and cook
- Add the cubed potatoes to the hot oil immediately.
- Stir well to coat with oil.
- Spread them in a single layer in the wok.
- Let them cook undisturbed for 3 minutes to develop color on the bottom.
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Ready when: Bottom of potatoes show light golden-brown color
Tip: Don't stir constantly at first—letting them sit builds flavor through browning
Stir and continue cooking
- Stir the potatoes and let them cook for another 4–5 minutes, stirring every 1–2 minutes so they brown on multiple sides.
- You want them partially cooked and mostly golden, not yet completely tender.
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Ready when: Potatoes are golden-brown on most sides and slightly tender when pierced with a fork
Tip: Stir every 1–2 minutes to ensure even cooking and browning without sticking
Add onions and turmeric
- Add the onion pieces to the wok.
- Sprinkle the turmeric powder over everything.
- Stir well to coat the vegetables with turmeric and mix evenly.
- Continue cooking, stirring often, for 6–7 minutes until the onions soften and turn translucent, and the potatoes become fully tender when pierced with a fork.
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Ready when: Onions are soft and translucent, potatoes are tender throughout, and mixture is golden with turmeric
Tip: Stir frequently so the turmeric distributes evenly and coats all the vegetables
Add chilies and finish cooking
- Add the slit green chilies and stir.
- Cook for 1 more minute, stirring gently.
- Taste and adjust seasoning with salt and a pinch of black pepper if desired.
- The stir-fry should be tender with warm spices and caramelized edges.
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Ready when: Green chilies are slightly softened and aroma is warm and spiced
Tip: Add the chilies near the end so they stay bright and don't lose their fresh flavor
Finish with fresh herbs and juice
- Remove from heat.
- Stir in the fresh cilantro and lemon juice if using.
- Taste and adjust salt one final time.
- Serve immediately while hot.
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Ready when: Cilantro and lemon juice are evenly mixed throughout
Tip: Add the lemon juice at the end so its brightness doesn't fade from heat
Good to know
Tips
- Cut potatoes into uniform ½-inch cubes so they cook evenly—larger pieces stay raw inside while smaller ones overcook
- Use a wok or wide skillet rather than a small saucepan; the open surface helps vegetables brown and release moisture
- Waxy potatoes (red, yellow, fingerling) hold their shape and texture much better than starchy russets, which become mealy
- If your wok or skillet feels crowded, cook in two batches rather than steaming the potatoes in their own moisture
Storage & reheating
Store covered in the refrigerator for up to 3 days. Reheat in a wok or skillet over medium heat, stirring often, for 3–4 minutes until hot. The stir-fry does not freeze well due to the potato texture.
Substitutions
- cumin seeds → ¾ tsp ground cumin. Ground cumin will not toast and bloom in flavor the same way, so add it with the turmeric instead of at the beginning. The flavor will be milder.
- fresh green chilies (such as serrano or jalapeño) → ½ tsp red pepper flakes or cayenne pepper. Add with the turmeric if using dried spices. The fresh pepper flavor will be lost, but the heat will remain.
- vegetable oil or ghee → coconut oil or mustard oil. Mustard oil is traditional in Indian cooking and adds a peppery note. Coconut oil adds subtle sweetness.
- waxy potatoes (such as red or yellow) → cauliflower florets or carrots cut into chunks. Extend cooking time for carrots to 8–10 minutes. Cauliflower cooks faster, about 8 minutes total. The dish character will change but the method stays the same.
