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Tomato butter beans with toast with pickled onions
youryum.com/recipes/tomato-butter-beans-with-toast-with-pickled-onions · serves 4

A soft bean supper with a sharp topping

Quick pickled onions cut through the thick tomato sauce and give buttery beans and toast a clean, crunchy contrast.

  • Vegetarian
  • high-fiber
Maren Ashby in her kitchen, in a dark apron, looking away from the camera
By Maren Ashby · Writes and tests everything here
Published 25 August 2026
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Tomato butter beans with sourdough toast and quick pickled red onions
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Prep
10 min
Cook
25 min
Total
35 min
Serves
4
Per serving
495kcal
Effort
Easy

The onions take fifteen minutes, which is exactly enough time to cook the beans. The hot vinegar softens their raw edge but leaves a little crunch, and that crunch matters beside a spoonful of buttery beans.

Make the finish first; the final texture depends on it staying distinct.

Keep the pickles away from the pan. Their job is to stay bright and sharp, not to cook into the tomato sauce. Drain them lightly at the table so a little vinegar hits the toast without turning it soggy.

Ingredients

Makes 4 servings

Tomato beans

Toast

Quick pickles

Equipment

  • Wide saucepan
  • Small frying pan
  • Toaster or grill

Method

  1. Start the tomato base

    Warm the olive oil in a wide saucepan over medium heat. Add the onion and a pinch of salt, then cook for six to eight minutes until soft and translucent. Stir in the garlic for one minute. Add the tomato paste and paprika and fry for 45 seconds, stirring constantly. It should darken slightly and smell sweet rather than raw.

    Let the sauce settle before you taste and adjust the salt.

  2. Simmer the beans

    Add the chopped tomatoes, butter beans and stock. Bring to a steady simmer, then cook uncovered for 18 to 20 minutes, stirring every few minutes. The sauce should coat the beans and leave a slow trail when you drag the spoon across the pan. If it is still watery, give it another five minutes before seasoning.

    Do not let the pan boil hard. Butter beans have thin skins, and a rough bubble breaks them against the base of the saucepan. A quiet simmer leaves some whole and lets the sauce thicken around them. Stir from the outside towards the middle, where the heat is strongest, and scrape the tomato paste off the bottom before it catches.

    Hands stirring tomato beans in a wide saucepan before finishing

  3. Toast the bread

    While the beans simmer, toast the sourdough until the cut sides are deeply golden. Brush with olive oil while hot. Do not rush this part: pale bread goes soft as soon as the sauce touches it, while a proper crust stays crisp long enough for the first few bites.

    The bread should crackle before the sauce touches it, then soften slowly.

  4. Finish with the special topping

    Put the sliced onion in a heatproof bowl. Stir the vinegar, boiling water, sugar and salt together, pour it over, and press the onion below the liquid. Leave for at least fifteen minutes while the beans simmer.

  5. Serve while the textures are clear

    Spoon the tomato beans into warm bowls or onto a wide platter. Add the toast at the side and finish with the prepared topping described above. Serve straight away. The sauce should be thick enough to hold a bean on the toast without running across the plate.

Butter beans tomatoes toast and quick pickled red onions arranged for cooking
Set out the beans, tomatoes, bread and finishing ingredients before the pan gets hot.

Why the quick pickled red onions belongs at the end

This is a quick pickle, not a jar for the cupboard. The boiling water dissolves the salt and sugar, while the vinegar takes the raw sting out of the onion. It should still have enough structure to snap when you bite it.

Red wine vinegar gives the pickle a deeper colour and a slightly fruity edge. Rice vinegar is softer and good if you want the tomatoes to lead. Either way, taste the liquid before adding the onion; it should be sharper than you want the finished onion to be.

Nutrition

Per serving, for 4 servings. Estimated from ingredient weights — it moves with the brands and cuts you actually use.

NutrientPer serving
Calories 495 kcal
Protein 20 g
Carbohydrate 71 g
Fibre 15 g
Fat 16 g

Source: Estimated from ingredient weights, USDA FoodData Central

Questions

Can I pickle the onion the day before?
Yes. It becomes softer and brighter pink overnight, but it keeps enough bite for several days.
Can I use white onion?
Yes, though the flavour is stronger. Slice it very thin and give it the full fifteen minutes.
What else can I do with the pickles?
Put them in sandwiches, grain bowls or alongside roast vegetables. Drain them lightly so they do not make bread wet.

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