Bangers and Mash with Teriyaki Onion Gravy
A cozy weeknight dinner with sausages, buttery mash, and a bold Japanese-style teriyaki onion gravy — ready in 30 minutes using pantry staples.
Equipment
- 1 air fryer For sausages and air-fried broccolini (variation)
- 2 sauce pan For boiling potatoes or simmering cauliflower and make the teriyaki onion gravy
- 1 potato ricer Recommended for fluffy, lump-free mashed potatoes and less effort
- 1 Colander To rinse and drain potatoes and drain peas
Ingredients
Mash Potato
- 500 g Unpeeled potato Sebago (Idaho)
- 40 ml Milk Full cream
- 30 gram Butter
- Salt to taste
Teriyaki Onion Gravy
- 150 g Onion sliced
- 30 g Butter
- 8 g Plain flour
- 50 g Soy sauce
- 120 g water
- 25 g Golden Syrup see note
- 20 g Sugar
- 1 g Garlic powder optional
- 10 g Seeded mustard optional but give nice acidity in sauce (recommended)
The rest
- 4 pieces Sausages Your choice of sausges
- 60 g Frozen peas
Instructions
the Mashed Potatoes
- Peel and chop potatoes into even pieces.
- Rinse briefly, then boil in salted water until fork-tender (10–12 minutes).
- Drain and immediately press through a potato ricer.
- Stir in butter and warm milk.
- Season with salt and mix until smooth.
Make the Teriyaki Onion Gravy
- Melt butter in a skillet over medium heat.
- Add sliced onions and cook until soft and golden (about 8–10 minutes).
- Stir in flour and cook for 1–2 minutes to form a light roux.
- Add soy sauce, water, golden syrup, sugar, and (optional) garlic powder and mustard.
- Cook until thick and glossy. Set aside.
Cook the Sausages
- Lightly coat sausages with oil.
- Place in an air fryer at 190°C (375°F) and cook for 12–15 minutes, flipping halfway.
- Rest for a few minutes before serving.
Prepare the Peas
- Heat frozen peas in hot water just before serving (do not overcook).
- Drain and set aside.
Assemble the Dish
- Plate mashed potatoes in the center.
- Top with cooked sausages.
- Spoon teriyaki onion gravy generously over the top.
- Finish with bright green peas.
Notes
Golden Syrup Substitute:
The closest substitute is honey, which matches the sweetness and texture well. Or another substitute is light corn syrup — use 40 g corn syrup in place of 25 g golden syrup. This matches the sweetness and texture. Dietary Options: For a lighter or keto-friendly version, swap the mashed potatoes with cauliflower mash. And use this keto recipe below.
The closest substitute is honey, which matches the sweetness and texture well. Or another substitute is light corn syrup — use 40 g corn syrup in place of 25 g golden syrup. This matches the sweetness and texture. Dietary Options: For a lighter or keto-friendly version, swap the mashed potatoes with cauliflower mash. And use this keto recipe below.
Keto Teriyaki Onion Gravy (≈300 g)
Ingredients
- 50 g Soy Sauce (≈3.5 oz)
- 120 g Water (≈5.3 oz)
- 19 g Monk Fruit Sweetener (golden syrup swap)
- 19 g Water (golden syrup swap)
- 2.8 g Rice Vinegar (optional, for brightness)
- 19 g Monk Fruit Sweetener (sugar swap)
- 150 g Sliced Onion (≈5.3 oz)
- 25 g Salted Butter (≈1.1 oz)
- 0.5 g Garlic Powder (≈¼ tsp)
- 10 g Seeded Mustard (optional) (≈2 tsp)
Method
- Melt butter in a saucepan over medium heat.
- Add onions and cook slowly until soft and golden (10–15 minutes).
- Stir in garlic powder (and mustard if using).
- Add soy sauce, water, monk fruit sweeteners, and simmer gently for 8–10 minutes.
- For thickness (keto option): Remove about one-third of the onion sauce, blend until smooth, then stir it back into the pan. Simmer 1–2 minutes until glossy.
- Stir in rice vinegar at the end (optional) for extra brightness. Adjust seasoning to taste