Japanese Images are for illustrative purposes only, may be inaccurate, and do not guarantee the presence or absence of specific ingredients. 
Serving Images are for illustrative purposes only, may be inaccurate, and do not guarantee the presence or absence of specific ingredients. Napolitan
A nostalgic Japanese yoshoku spaghetti stir-fried with ketchup, sausage, and peppers for a sweet-savory comfort plate.
Contains common allergens
In the app, Listahan checks these against your household automatically.
Good to know
- Ready in under 30 minutes
Matched from this dish's own ingredients and timing. Browse more: 30-minute meals
Instructions
5 steps- 1
Boil the spaghetti in salted water for 2 minutes past the package time so it is soft in classic Napolitan fashion, then drain and toss with 1 tsp oil to prevent sticking.
- 2
Melt the butter with 1 tbsp oil in a large skillet over medium heat and saute the onion, sausage, and mushrooms for 4 minutes until the onion softens.
- 3
Add the bell pepper and cook 1 minute more, then push everything to the side and fry the ketchup in the cleared space for 30 seconds to caramelize and mellow its acidity.
- 4
Add the drained spaghetti and toss vigorously for 2 minutes until every strand is coated in glossy red sauce and lightly crisped at the edges.
- 5
Season with a pinch of salt and pepper, plate, and finish with the grated Parmesan and a few cranks of black pepper.
Images are for illustrative purposes only, may be inaccurate, and do not guarantee the presence or absence of specific ingredients. Listahan Family Score™
74/100
Good fit for most families
Score reflects how well this recipe fits a typical busy household. In the app, your Family Score is personalized to your household's allergens, kids, and pantry.
Nutrition
per serving500
Calories
21 g
Protein
88 g
Carbs
7 g
Fat
Estimated per serving. Actual values depend on the brands and portions you use.
Listahan cooking guide
Chef notes & practical guide
Technique notes, ingredient swaps, serve-alongside ideas, storage guidance, and equipment for this recipe.
Cultural context
Napolitan is a Japanese diner pasta of soft spaghetti, sausage, and vegetables tossed in ketchup, created in post-war Yokohama. Despite the Italian-sounding name, it is pure yoshoku comfort food, nostalgic and unapologetically retro.
Listahan note
This version embraces the unorthodox details that make it Napolitan, deliberately soft pasta and ketchup fried to mellow its acidity, rather than trying to make it a proper Italian dish.
Technique cues
- Boil the spaghetti past al dente, even a couple of minutes over; soft noodles are authentic to Napolitan, not a mistake.
- Fry the ketchup in a cleared spot of the hot pan for a moment before tossing; cooking it mellows the raw acidity and deepens the flavor.
- Toss the noodles hard so they coat evenly and crisp a little at the edges against the pan.
Kitchen flow
- Parallel prep
- Slice the vegetables and sausage while the pasta boils; the toss takes only a couple of minutes.
- Make-ahead
- Best fresh, but Napolitan reheats better than most pasta thanks to its soft noodles and sturdy sauce.
- Leftover move
- Reheat in a pan, or sandwich leftover Napolitan in a buttered roll for a retro koppepan.
- Cleanup rhythm
- One skillet and the pasta pot; rinse the skillet before the ketchup dries.
Ingredient brief
Role, handling, and swap guidance for each key ingredient.
Spaghetti
The body
Purpose: Soft-cooked spaghetti is the deliberately retro base.
Handling: Boil past the package time and toss with a little oil to keep it from sticking.
Adaptation: Any long pasta works; gluten-free spaghetti adapts it.
Sausage or hot dogs
The protein
Purpose: Diagonally sliced wieners are the classic, nostalgic protein.
Handling: Slice on the bias and saute until lightly browned.
Adaptation: Ham or bacon work; mushrooms alone for a meat-free version.
Bell pepper, onion, mushroom
The vegetables
Purpose: They add sweetness, color, and the familiar diner-pasta mix.
Handling: Slice thin and saute until just softened.
Adaptation: Whatever quick-cooking vegetables you have on hand.
Ketchup
The defining sauce
Purpose: Ketchup, fried to mellow it, is the entire identity of Napolitan.
Handling: Fry briefly in the pan before tossing with the pasta.
Adaptation: There is no substitute that keeps it Napolitan; quality ketchup helps.
Butter and Parmesan
Richness and finish
Purpose: Butter adds gloss and Parmesan a salty, savory top note.
Handling: Saute with butter and finish with grated Parmesan and pepper.
Adaptation: Use oil and skip cheese for a dairy-free version.
Technique notes
- Lean into the soft noodles and fried ketchup; trying to make Napolitan al dente and fresh misses the point.
- Frying the ketchup is the single step that lifts it from childish to genuinely tasty.
- Finish with plenty of black pepper and Parmesan to balance the sweetness.
Ingredient swaps
- Vegetarian direction
- Skip the sausage and add extra mushrooms and peppers.
- Dairy-free direction
- Use oil instead of butter and skip the Parmesan.
- Gluten-free direction
- Use gluten-free spaghetti and gluten-free sausage.
Serve alongside
- Simple green salad
- Corn soup
- Garlic bread
- Pickles
- Iced tea
- Cola
- Sparkling water
Serving suggestions only — check pairings for your household's allergens.
Storage & reheating
- Refrigerate up to 3 days in a sealed container.
- Reheat in a pan with a splash of water; the soft noodles hold up well.
- Freezing is possible up to 1 month, though fresh is better.
Equipment
- Large skillet
- Pot for pasta
- Tongs
- Grater for the Parmesan
Make this household-aware
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Plan it in Listahan
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