Rustic Tomato Galette with Gruyere & Thyme – Simple, Stunning, Delicious

A French-inspired twist on classic Southern tomato pie—this rustic galette with Gruyère, Dijon, and thyme celebrates summer tomatoes in all their glory.

Rustic Tomato Galette with Gruyere & Thyme – Simple, Stunning, Delicious

Summer reminds me of fresh vine-ripened tomatoes and all the dishes made from them. One of my favorite childhood memories is of my mom making a classic Southern tomato pie—juicy tomato slices layered into a buttery crust and topped with a tangy mix of cheese and mayo. It was simple, comforting, and deeply tied to the rhythm of summer.

This Rustic Tomato Galette with Gruyère & Thyme is my take on that tradition, reimagined with a French twist. I kept the essence—sun-ripened tomatoes and plenty of cheese—but traded the mayo topping for a swipe of bold Dijon and swapped in melty Gruyère and nutty Parmesan for a more savory, elegant feel. Wrapped in a flaky, golden crust and finished with fresh herbs, it’s just as nostalgic as the pie I grew up with, but elevated in the best way.

Whether you serve it warm on a breezy back porch or at room temp with a glass of chilled wine, this galette is pure summer—rustic, refined, and packed with the kind of flavor only a fresh tomato can deliver.

 

What Ingredients Do I Need?

This rustic tomato galette keeps things simple, letting seasonal ingredients shine. Here’s what you’ll need to bring it all together:

• All-purpose flour – For the buttery homemade galette crust.

• Unsalted butter – Keeps the crust rich and flaky.

• Ice water – Helps the dough come together without overworking it.

• Fresh tomatoes – Vine-ripened, juicy, and full of summer flavor.

• Shallot – Adds a hint of mild, sweet onion flavor.

• Olive oil – For tossing the tomato mixture and enhancing richness.

• Fresh thyme – Brings an earthy, aromatic touch to the filling.

• Garlic – Adds savory depth.

• Dijon mustard – The secret layer of sharp, tangy contrast under the tomatoes.

• Gruyère cheese – Melty, nutty, and rich.

• Parmesan cheese – For a salty, umami finish.

• Egg – Brushed on the crust for a beautiful golden color.

• Fresh basil – A final herbal flourish before serving.

• Salt & pepper – Seasoning to enhance every bite.

Substitutions and Variations

Substitutions

Want to customize your galette or work with what you have on hand? Here are some easy swaps:

• Gruyère cheese → Use sharp white cheddar, Fontina, or Comté for a similar melty texture and depth.

• Parmesan cheese → Try Asiago, Pecorino Romano, or even grated aged cheddar.

• Shallot → Substitute with a few thin slices of red onion or green onions.

• Fresh thyme → Dried thyme works in a pinch, or swap in oregano or Herbes de Provence.

• Dijon mustard → Use whole grain mustard for texture or stone-ground mustard for a milder bite.

• Tomatoes → Any variety works—heirloom, Roma, cherry (halved), or even a mix for added color.

• Homemade crust → Short on time? A store-bought pie crust or puff pastry will do in a pinch—just adjust baking time as needed.

Variations

This tomato galette is endlessly versatile—perfect for adapting to what’s in season or what you’re craving. Here are two delicious variations to try:

• Caprese-Inspired Galette:  Layer in a few slices of fresh mozzarella with the Gruyère, and top with cherry tomatoes and a drizzle of balsamic glaze after baking. Finish with fresh basil for a galette that echoes the flavors of a classic Caprese salad.

• Roasted Mushroom & Tomato Galette:  Add a layer of sautéed mushrooms (cremini or shiitake work beautifully) beneath the tomatoes. The earthy mushrooms pair perfectly with the Gruyère and thyme, giving this variation a deeper, more savory flavor—great for late summer or early fall.

Kitchen Tips & Notes

• Salt your tomatoes! – Don’t skip the salting and draining step—it’s key to preventing a soggy crust and concentrating tomato flavor.

• Chill the dough thoroughly – A well-chilled dough rolls out more easily and bakes up flakier.

• Don’t worry about perfection – The beauty of a galette is in its rustic charm. Pleat the edges loosely and let it be freeform.

• Tomato variety matters – Use the ripest, juiciest tomatoes you can find—heirlooms, Romas, or even colorful cherry tomatoes all work well.

• Leftovers? – Store any leftover slices in the fridge and reheat gently in a 300°F oven to revive the crisp crust.

What to Serve with Rustic Tomato Galette with Gruyere & Thyme

This rustic tomato galette makes a gorgeous centerpiece for any summer meal. Here are a few favorite ways to serve it:

• Pair with a crisp green salad – A simple mix of arugula or baby greens with a lemon vinaigrette balances the richness of the galette.

• Serve as a brunch or lunch main – Slice it into wedges and serve warm or at room temperature with iced tea, sparkling water, or a light white wine.

• Add it to a summer picnic spread – This galette travels well and doesn’t mind being eaten at room temp—perfect for park blankets or backyard tables.

• Make it part of a casual dinner – Round out the meal with grilled veggies, corn on the cob, or a chilled cucumber soup.

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