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Mission Hills Sourdough Toast with Heirloom Tomato & Fresh Mozzarella

Name: Mission Hills Sourdough Toast with Heirloom Tomato & Fresh Mozzarella
Prep time: 20 min
Cook time: 45 min
Total time: 65 min
Yield: 4 servings
Cuisine: california-farm
Ingredients: 7 oz active sourdough starter, fed and bubbly; 10.5 oz organic bread flour (or sprouted spelt flour), unbleached; 7 oz filtered water, room temperature; 1 tsp sea salt, fine grain; 9 oz fresh mozzarella di bufala (cow or buffalo), sliced into 3-4 thick rounds; 14 oz heirloom tomatoes, sliced into 1/2-inch rounds; 1/4 cup extra-virgin olive oil, high-quality, cold-pressed; 1/2 cup fresh basil leaves, torn by hand; 1/2 tsp flaky sea salt, none; 1/8 tsp freshly cracked black pepper, coarse grind

Crispy, fermented sourdough toast topped with creamy, fresh mozzarella and vibrant, vine-ripened heirloom tomatoes. This dish captures the essence of California farm-table dining, offering a savory, umami-rich breakfast rich in healthy fats and live cultures without any refined sugars or industrial seed oils.

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Serves

Prep

20 min

Cook

45 min

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Mission Hills Sourdough Toast with Heirloom Tomato & Fresh Mozzarella — authentic California Farm recipe from Taste Meridian

Ingredients

Serves

The Sourdough

7 ozactive sourdough starter, fed and bubbly
10.5 ozorganic bread flour (or sprouted spelt flour), unbleached
7 ozfiltered water, room temperature
1 tspsea salt, fine grain

The Topping

9 ozfresh mozzarella di bufala (cow or buffalo), sliced into 3-4 thick rounds
14 ozheirloom tomatoes, sliced into 1/2-inch rounds
1/4 cupextra-virgin olive oil, high-quality, cold-pressed
1/2 cupfresh basil leaves, torn by hand
1/2 tspflaky sea salt, none
1/8 tspfreshly cracked black pepper, coarse grind

Equipment

Dutch oven or combo cooker — creates the steamy environment necessary for a proper sourdough oven spring and crust
Banneton (proofing basket) — allows the dough to hold its shape and creates the signature spiral pattern
Baking stone or steel — retains intense heat to crisp the sourdough base instantly
Microplane — for grating a touch of lemon zest if desired for brightness

A little context

Rooted in the California 'farm-to-table' movement of the 1970s and the Italian tradition of Caprese, this dish honors the simplicity of high-quality ingredients. We have stripped away the industrial shortcuts often found in modern versions, such as seed-oil-based margarine, preservative-laden packaged mozzarella, or sugar-laden glazes. Instead, we rely on the natural sweetness of ripe fruit and the richness of pasture-raised dairy to create a meal that feels indulgent yet aligns with longevity protocols.

Why this food

The longevity story

This recipe leverages the polyphenol density of extra-virgin olive oil and the lycopene bioavailability from heated tomatoes enhanced by fat. The sourdough fermentation process naturally reduces phytates and pre-digests gluten, making it gentler on the gut than conventional wheat bread. Fresh mozzarella provides high-quality casein protein and calcium, while the heirloom tomatoes deliver vitamin C and antioxidants. The absence of seed oils prevents the intake of inflammatory omega-6 fatty acids, favoring the stable monounsaturated fats of olive oil.

Method

01
Autolyse the flour
In a large bowl, combine the organic flour and water. Mix with wet hands until no dry flour remains. Cover and let rest for 60 minutes. This initial hydration activates enzymes and begins gluten development without added salt, which slows fermentation.
02
Add starter and salt
Add the active sourdough starter and sea salt to the autolyse dough. Pinch and fold the mixture until fully incorporated. The dough will feel sticky; this is normal for high-hydration sourdough.
03
Bulk fermentation with folds
Cover the bowl and let it sit at room temperature (22°C / 72°F) for 4 hours. Perform a set of stretch-and-folds every 30 minutes for the first 2 hours (4 sets total). This strengthens the gluten network without over-kneading.
04
Cold retard for flavor
Shape the dough into a tight round (boule) and place it seam-side up in a floured banneton. Cover tightly and refrigerate for 12 to 24 hours. This cold fermentation develops complex, tangy flavors and improves digestibility.
05
Preheat and bake
Place your Dutch oven (or combo cooker) in the oven and preheat to 240°C (465°F) for at least 45 minutes. Carefully invert the dough onto a piece of parchment paper, score the top with a razor blade, and lower it into the hot pot. Cover and bake for 20 minutes, then uncover and bake for another 20-25 minutes until deep golden brown and the internal temperature reaches 93°C (200°F).
06
Cool the loaf
Remove the bread from the pot and let it cool on a wire rack for at least 45 minutes. Cutting into hot bread creates a gummy crumb; patience ensures the perfect texture.
07
Toast the bread
Slice the cooled sourdough into 1-inch thick slices. Toast them in a dry cast-iron skillet or under a broiler until the edges are crisp and the center is warm. Do not add oil to the pan yet.
08
Assemble the toast
Place a slice of toasted sourdough on a serving plate. Top with a thick round of fresh mozzarella, followed by overlapping slices of heirloom tomato.
09
Season and finish
Drizzle generously with high-quality extra-virgin olive oil. Season with flaky sea salt and freshly cracked black pepper. Scatter torn fresh basil leaves over the top. Serve immediately while the cheese is cool and the bread is warm.

Pro tips

✦Sourcing the tomatoes: Pick heirloom tomatoes that feel heavy for their size and have a strong, earthy aroma at the stem; if they smell like nothing, they lack flavor and nutrients.
✦Cheese selection: Avoid 'fresh mozzarella' blocks that come in brine with preservatives; look for small-batch local dairies or Italian imports with only milk, salt, and rennet listed.
✦Olive oil check: Ensure your EVOO is stored in a dark bottle or tin and has a harvest date within the last 12 months to maximize polyphenol content.
✦Bread storage: If you have leftover sourdough, store it cut-side down on a wooden board; never refrigerate bread as it accelerates staling.
✦Temperature control: If your kitchen is very warm, reduce the bulk fermentation time or move the dough to the fridge earlier to prevent over-fermentation.

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Equipment

Dutch Oven →Microplane →

Substitutions

fresh mozzarella di bufala → fresh goat cheese (chèvre) or pasture-raised feta (provides a tangier profile while maintaining high-quality dairy fats)
heirloom tomatoes → cherry tomatoes, halved and roasted (roasting concentrates the lycopene and sweetness if fresh tomatoes are out of season)
organic bread flour → sprouted spelt or einkorn flour (ancient grains are often better tolerated and lower in gluten content)

Storage

Toast keeps 3 days in an airtight container at room temperature; do not refrigerate. Tomatoes and mozzarella are best consumed fresh but can be stored separately in the fridge for 1 day. Reassemble just before eating.

What to serve with it

Hot green tea (sencha or matcha) for catechins
Sparkling water with a wedge of lemon
A small glass of dry red wine (Cabernet or Pinot Noir) for resveratrol
Freshly squeezed orange juice without added sugar

FAQ

Can I use store-bought sourdough?+

Yes, but check the label carefully. Many supermarket 'sourdough' loaves contain added sugar, yeast, and seed oils. Look for a clean ingredient list: flour, water, salt, and starter only.

Why is extra-virgin olive oil better than avocado oil here?+

While avocado oil is healthy, EVOO contains significantly higher levels of hydroxytyrosol and oleuropein, potent polyphenols that drive the anti-inflammatory benefits of this dish. Use avocado oil for high-heat searing, but EVOO for finishing.