Root Vegetables Galette (Rustic Tart)
This vegetarian root vegetables rustic tart is a free-form galette built on a yeasted bread-style crust, filled with carrots, parsnips, mushrooms and onions bound with mustard and a beaten egg. You spread the dough by hand, pile the sauteed filling in the centre, fold the edges over and bake at 200C until golden and crisp.
While I’m usually all about quick and hassle-free recipes, weekends offer me the chance to indulge in longer kitchen sessions, crafting menus for loved ones. Cooking brings me immense joy and relaxation — though, let’s be honest, weekdays are a different story with their endless to-do lists! Now, about this rustic tart: baking isn’t typically my thing, but savory tarts are a delightful exception, especially when they serve up comforting vegetarian goodness.
So, here’s how this recipe came to be: after watching Jamie Oliver’s episode where he whipped up a heavenly pizza crust, I couldn’t resist adapting it for a galette. The filling, while simple, boasts a few secret ingredients that elevate this tart to new heights. I hope you enjoy this vegetarian galette with root vegetables as much as I did!
Key ingredients
Wheat flour and dry yeast form the backbone of the crust. This is a yeasted dough, closer to a soft bread than a classic shortcrust, which is exactly why the edges stay tender inside and crisp on the outside. Use plain bread or all-purpose flour, and let the yeast do its job: the dough needs to roughly double before you shape it.
Bread crumbs are the secret ingredient here. You sprinkle them over the greased pan before the dough goes in, and they soak up moisture from the filling so the bottom never turns soggy. They also add a faint toasted crunch under each slice. Skip them and you risk a damp base — they really earn their place.
Carrots and parsnips are the heart of this tart. Slice them evenly so they cook at the same rate, and save a handful of slices to fan over the top before baking. Parsnips bring a gentle sweetness and a slightly nutty edge that carrots alone don’t have, so don’t be tempted to swap them all out for more carrot.
Button mushrooms go in last when you saute the filling, because they release a lot of water. Adding them after the carrots and parsnips are nearly done lets that moisture cook off rather than steaming the rest of the vegetables. You want them browned and reduced, not pale and watery.
Mustard, oregano and ginger powder are what take this from a plain vegetable bake to something with character. The mustard cuts through the sweetness of the roots, oregano gives it a savory backbone, and a little ginger powder adds warmth in the background. The beaten egg mixed into the filling binds everything so the slices hold together when you cut them.
Tips for getting it right
- Let the dough fully double. Give it the full 45 to 60 minutes at room temperature. If your kitchen is cold, it will take longer — the dough is ready when it has clearly grown and feels light and puffy, not when the timer goes off.
- Cook off the filling moisture. The most common mistake is loading wet filling onto the dough. Saute until the mushrooms have given up their water and the pan looks dry, then take it off the heat. A dry filling means a crisp crust.
- Add the egg off direct high heat. Stir the beaten egg into the warm filling and mix well so it coats the vegetables evenly rather than scrambling into lumps. It sets properly once the tart bakes.
- Keep the dough around 1cm thick. Roll it too thin and the filling will leak through as it bakes; too thick and the centre stays doughy. About a finger’s width is the sweet spot for a galette that holds its shape.
- You know it is ready when the folded crust is deep golden and firm to the touch, and the reserved carrot and parsnip slices on top have caramelised at the edges. Brush the crust with olive oil before baking for extra colour and shine.
How to adapt it
This galette is forgiving, so treat the vegetables as a guide rather than a rule. If parsnips are out of season, lean on more carrots or add a few slices of celeriac for the same earthy sweetness. The mushrooms can be any variety you like — a mix of button and chestnut mushrooms gives a deeper flavour. You can dial the ginger powder up or down depending on how much warmth you want in the background, and a pinch of smoked paprika works nicely alongside the oregano if you fancy a smokier note.
Storage and make-ahead
This tart keeps well in the fridge for up to three days in an airtight container. Reheat slices in a hot oven for ten minutes rather than the microwave, which softens the crust — the oven brings back the crunch. You can also prepare the filling a day ahead and keep it chilled, then make the dough fresh on the day you bake, since yeasted dough is at its best shaped and baked the same day it has risen.
If you love savory tarts as much as I do, try my Beetroot Galette, my Zucchini and Asparagus Tart, or the Gluten-Free Tart with Mushrooms and Veggies for another rustic, vegetable-packed bake. You’ll find plenty more in my collection of savory tart recipes.
Summarise & Save This Recipe
★ Add us as a trusted Google source
Root Vegetables Galette
Ingredients
Galette crust:
- 500 g wheat flour
- 250 ml warm water
- 1 tsp dry yeast
- ½ tsp salt
- 2 Tbsp bread crumbs the secret ingredient for a perfect, crunchy crust!
Filling:
- 250 g button mushrooms sliced
- 3 carrots sliced
- 2 parsnips sliced
- 2 onions julienne cut
- 1 egg beaten
- 2 Tbsps mustard
- 1 tsp oregano
- 1/2-1 tsp ginger powder
- 2 Tbsp olive oil for brushing
- salt and pepper to taste
Instructions
- Crust:
- Add flour, salt and dry yeast in the food processor. Set it on the lowest speed and slowly pour in warm water. It doesn’t have to be mixed very well.
- Take the dough out of the food processor and give it a ball shape.
- Put it in a bowl and cover with a clean towel. Leave it at room temperature for 45-60 minutes, until it doubles its volume.
- Filling:
- Heat some oil in a large pan. Saute chopped onion. Add sliced carrots and parsnips (save some slices to top the tart with). When nearly done, add sliced mushrooms, mustard, and spices.
- Add beaten egg and mix well.
- Remove from heat.
Assembly:
- Sprinkle some flour onto your kitchen table. Spread the dough and give it a round shape. It has to be about 1cm thick.
- Grease the pan with some oil. Sprinkle it with breadcrumbs. Put the dough in the pan. Add the filling. Pull the margins of the dough over the filling.
- Cover the tart with the remaining carrot and parsnip slices.
- Let it cook for 20-30 minutes at 200C.
Frequently Asked Questions
A galette is a free-form, rustic tart baked without a tin. You roll out the dough, pile the filling in the centre and fold the edges over by hand, so the shape is deliberately uneven. A classic tart is baked in a fluted tin with neat straight sides. This recipe is a galette built on a yeasted, bread-style crust.
The bread crumbs are sprinkled over the greased pan, under the dough, where they soak up moisture released by the vegetable filling as it bakes. This keeps the base from turning soggy and adds a faint toasted crunch. It is a small step that makes a real difference to the crust.
As written this tart is vegetarian, not vegan, because the filling is bound with a beaten egg and brushed with egg as well. To make it vegan you would need to replace the egg with a plant-based binder, though the texture and set of the filling will change, so it is not a like-for-like swap.
Firm root vegetables that hold their shape are ideal. This recipe uses carrots, parsnips, onions and button mushrooms. Celeriac and beetroot also work well, while soft or very watery vegetables are better cooked down first so they don’t make the crust soggy.
Three things help: sprinkle bread crumbs over the pan before the dough goes in, cook the filling until the mushrooms have released and lost their water, and keep the dough around 1cm thick. A dry filling on a properly risen crust bakes up crisp rather than damp.
You can make the filling a day in advance and keep it chilled in the fridge. The yeasted dough is best shaped and baked the same day it rises. Once baked, the tart keeps for up to three days and reheats well in a hot oven for about ten minutes.
Love the crust!