There are those evenings when you’re not looking for something new or complicated, but for a dish that slows your pace. Something that gently fills your kitchen with aroma as it bakes, that you stir now and then, and then scoop into deep bowls with a spoon. This oven dish with sweet, tender onions, lentils, and farro is exactly that: everyday food, but better—full of layers of flavor, without any fuss.
Why this works so well
The base is simple: onions that slowly caramelize, a splash of acidity for brightness, and hearty lentils with farro to bring it all together. In the oven, the flavors meld into something savory, rich, and fresh at the same time. It feels like comfort, but not heavy—more like a dish you’ll want to make often because it fits so naturally into your week.
Ingredients (serves 4)
- Onions: 5–6 medium onions, thinly sliced into half rings
- Olive oil: 3–4 tbsp, plus extra for finishing (e.g. extra virgin olive oil with a soft, fruity finish)
- Butter (optional): 1 tbsp, for extra creaminess
- Garlic: 3 cloves, finely chopped
- Tomato paste: 1 tbsp
- Sherry vinegar: 1–2 tbsp (e.g. sherry vinegar with a warm, mild acidity)
- Vegetable stock: 750 ml (warm)
- Lentils: 200 g (preferably green or brown lentils; not red)
- Farro: 150 g (or: spelt or pearl barley)
- Bay leaf: 1–2
- Thyme: 1 tsp dried or a few sprigs
- Salt & pepper to taste (extra delicious with salt with wild garlic for a mild, green kick)
- To serve: yogurt or crème fraîche, a handful of parsley or dill, and optionally some grated hard cheese
Preparation method
1) Take your time with the onions
Preheat the oven to 190°C. Place a large ovenproof pan or Dutch oven over medium heat. Add olive oil (and butter, if you like) and add the onions with a pinch of salt. Cook for 15–20 minutes, stirring regularly, until the onions are soft and turning a deeper color. They don’t need to caramelize perfectly evenly—as long as they smell sweet and get a bit sticky around the edges.
2) Build flavor in layers
Add the garlic and sauté for 1 minute. Stir in the tomato paste and let it “cook out” briefly until it darkens. Deglaze with sherry vinegar: you’ll immediately smell how it brightens the dish. Scrape up any browned bits with your spoon—there’s lots of flavor there.
3) Add lentils, farro, and broth
Add the lentils, farro, bay leaf, and thyme to the pan. Pour in the warm broth and stir well. Bring to a boil and taste the liquid: it should already taste good, as the grains and lentils will soak it all up. Season with pepper and, if needed, a bit more salt.
4) The oven does the work
Place a lid on the pan (or cover well). Put in the oven for 35–45 minutes, until the lentils are cooked and the farro is al dente. Stir once halfway through. Too dry? Add a splash of broth or water. Too wet? Leave uncovered for the last 10 minutes in the oven to thicken.
5) Finishing touches
Remove the bay leaf. Taste and finish with extra pepper, a small splash of olive oil, and, if you like, a few drops of vinegar for a bit of zing. If you enjoy a subtle flavor boost: a pinch of Nicolas Vahé salt or herb mix works beautifully here, as does a gentle finish with their oil—not overpowering, just a bit more depth.
Serving tips (rest on the table)
- With something fresh: a spoonful of yogurt or crème fraîche on top makes it creamy and brings out the sweetness of the onions.
- With greens: parsley or dill adds a fresh, herby lift.
- With something crunchy: serve with toasted bread or crispy croutons.
- Table moment: serve everything in deep plates and place a bowl in the center. On stoneware with a calm, matte look (think Bloomingville), this dish really shines—simple, warm, inviting.
Variations that always work
Make it a bit richer
- Stir in 50–80 g grated hard cheese at the end for extra savoriness.
- Add sautéed mushrooms for a deeper, earthier character.
Make it lighter and greener
- Stir in a few handfuls of spinach or kale just before serving; the residual heat is enough.
- Finish with lemon zest for a fresh, clean aftertaste.
No farro at home?
- Use spelt or pearl barley (same idea, same calm).
- Or go for rice: just add a little less liquid and check more often.
FAQ
Can I adapt this dish to my own taste?
Yes. See it as a base: play with extra acidity (vinegar or lemon), herbs (thyme, oregano), or finishing touches (yogurt, cheese, fresh herbs) until it fits your evening perfectly.
Which variations go well with this recipe?
Mushrooms, spinach, roasted root vegetables, or a handful of cheese almost always work. A subtle herb or salt finish from Nicolas Vahé can also sharpen the flavors just a bit.
How do I make this dish weeknight-friendly?
Slice the onions in the morning and store them in a sealed container. You can also make the casserole completely ahead and reheat it later; just add a splash of broth to make it creamy again.
Just a bit longer: cooking as a rhythm
This isn’t a dish that demands attention. It just asks for a little time—and gives you peace in return. While the onions slowly turn sweet and the oven takes care of the rest, your evening naturally shifts to a calmer pace. And when you taste it: soft, savory, with just enough freshness—it suddenly makes a weekday feel like something to pause for.
