AI photoVegetarian "Burger" with Tomato and Lentil Filling
A hearty veggie filling of lentils, tomatoes and vegetables, topped with cheddar and served in a bun.
Labels are worked out automatically from the ingredients and can be wrong. Check the packaging if it matters to you.
Ingredients
- 1 pcs Onion finely chopped
- 100 g Courgette coarsely grated
- 100 g Carrot coarsely grated
- 2 clove Garlic finely grated
- 1 tsp Dried thyme
- 1 tsp Dried rosemary
- 0.5 tsp Smoked paprika
- 400 g Canned chopped tomatoes
- 100 ml Stock
- 150 g Black beluga lentils
- 50 ml Double cream
- 1 tsp Cornflour
- 50 ml BBQ sauce
- 2 tbsp Sweet mustard
- 20 g Butter
- 2 tbsp Olive oil
- Salt
- Black pepper freshly ground
- 4 pcs Burger buns
- 150 g Mature cheddar sliced
- 50 g Gherkins sliced
- 1 bunch Parsley finely chopped
Steps
Fry the onion in oil and butter for 5-7 minutes until soft. Add the courgette, garlic, thyme, rosemary and smoked paprika and fry for another minute.
7 minAdd the chopped tomatoes, stock, lentils and cornflour mixed into the cream. Stir, cover and simmer on a medium-low heat for 30 minutes.
30 minSeason with BBQ sauce, mustard, salt and pepper and simmer uncovered for a further 15-20 minutes. Stir a few times, making sure it doesn't catch while the liquid reduces slightly. Scatter the cheddar on top and let it melt.
18 minWarm the burger buns, divide the lentil filling with cheddar and gherkins between them. Sprinkle with finely chopped parsley and serve immediately.
2 min
This isn't really a burger. There's no patty, no binding, nothing you could flip with a spatula. What you've got is a thick, savoury lentil-tomato stew, cooked down until it's dry enough to sit on bread without running off your wrist — and that's the whole trick of the dish. Call it what it is: a sloppy joe with a black lentil instead of mince, dressed up in a bun because bread and melted cheese make anything feel like a proper meal.
What decides whether this works is reduction, not seasoning. Lentils and tinned tomatoes both carry a lot of water. If you stop simmering the moment the lentils are soft, you've made a soup, and it will soak through the bun in under a minute — nobody wants to eat a burger with a spoon. The uncovered 15-20 minutes at the end isn't padding, it's the step that turns stew into filling: the sauce has to visibly thicken, cling to the back of the spoon rather than run off it, before it's ready for bread.
Some say black lentils (beluga) go mushy and lose their shape, so you can't tell when they're done. No — the opposite is true, that's why they're used here. Beluga lentils hold a bite even cooked through, unlike red or yellow lentils which collapse into mash. You're looking for lentils that are soft all the way through but still distinct, not a porridge. If they're still a bit chalky in the centre, they need longer, not more liquid.
The onion goes in first and slowly, in butter and oil together, because butter alone burns before the onion softens and oil alone gives you no flavour underneath. Five to seven minutes isn't a clock you're watching — it's "the onion stops being sharp-smelling and raw-looking and turns translucent and sweet." That's your actual signal. Rush this and the whole dish tastes thin later, because there's no base note to carry the tomato and lentil.
The courgette and carrot are grated coarse on purpose, not for looks. Fine grating turns them to mush that disappears into the sauce — coarse grating means they keep a little texture and bulk out the filling so it isn't just lentils and tomato paste, which would be heavy and one-note. If you don't have courgette, any mild, watery vegetable that cooks down fast works the same way — a diced pepper, a handful of mushrooms, even extra carrot.
Smoked paprika, thyme and rosemary are doing a job tinned tomatoes can't do on their own: tinned tomatoes are flat and slightly metallic until something smoky or resinous cuts through. If you're out of smoked paprika, a few drops of liquid smoke or even a splash of whisky will fake the same effect — not traditional, but it works on the same principle. Dried herbs here, not fresh — dried thyme and rosemary survive thirty minutes of simmering and still taste of something; fresh herbs would just dissolve and vanish. Save fresh herbs — the parsley — for the very end, where they're meant to stay bright and recognisable.
BBQ sauce and sweet mustard are added after the long simmer, not before, because sugar in both would catch and burn if it sat in the pan from the start over forty minutes. They're also doing the work a proper stock or long-reduced tomato sauce would do on its own, given time you don't have on a Tuesday — they're a shortcut to sweetness and tang, not a flavour in their own right. Any tangy-sweet condiment with some vinegar backbone does the same job: a good brown sauce, a fruit chutney loosened with a splash of vinegar.
Mature cheddar, not mild — mild cheddar melts but says nothing; mature cheddar has enough sharpness to cut through the sweetness of the BBQ sauce and the richness of the cream. Scatter it on and let the heat of the pan do the melting rather than grilling it, because on a domestic hob you've got no overhead heat to brown it anyway — melted and glossy is the target, not browned.
Gherkins are the one ingredient here that isn't cooked, and that's deliberate — everything else in the bun is soft, sweet, rich. You need one thing that's sharp, crisp, and cold by contrast, or the whole burger slides into mush in the mouth. If gherkins aren't to hand, a quick pickled cucumber or even a squeeze of lemon over raw sliced cucumber gets you the same contrast.
And the buns — warm them, don't toast them hard. A filling this wet needs a bun with a bit of structural give, warmed just enough to be pliable, not crisped into something that'll shatter and spill the filling the moment you bite down. This is where patience at the stove earlier pays you back: get the reduction right in the pan, and the bun barely has to do any work holding things together.