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Holiday Brunch Strata with Ham, Cheese & Root Vegetables
There’s something magical about a holiday morning when the house smells like butter-toasted bread, caramelized onions, and smoky ham long before the gifts are opened. This strata—layered with cubes of crusty sourdough, ribbons of aged Gruyère, nuggets of rosemary-kissed ham, and a mosaic of roasted root vegetables—has been my secret weapon for every Christmas brunch since 2014. I prep it the night before, tuck it into the fridge, and slide it into the oven while the coffee brews. By the time the cinnamon rolls are gone and the mimosas are refilled, the strata has puffed into a golden crown, the edges bubbling with cheese and the center custardy and tender. It feeds a crowd, slices like a dream, and tastes like you spent all morning fussing—when really, the fridge did the heavy lifting.
Why This Recipe Works
- Make-ahead magic: Assemble up to 24 hours early; the bread soaks up every drop of seasoned custard for maximum flavor.
- Root-vegetable upgrade: Roasted parsnips, carrots, and beets add earthy sweetness that balances salty ham and rich cheese.
- Texture contrast: Cubes of day-old sourdough stay chewy inside while the top turns irresistibly crisp.
- Cheese strategy: A duo of nutty Gruyère and sharp white cheddar melts into stretchy strands without becoming greasy.
- Holiday flexibility: Swap in leftover turkey, roasted squash, or sautéed greens—this strata welcomes whatever’s in your fridge.
- Feed-a-crowd size: A 9×13-inch pan yields 12 generous squares, perfect for buffet-style serving.
Ingredients You'll Need
Great strata starts with great bread. Look for a rustic sourdough or country loaf—something with a chewy crumb and blistered crust. Stale bread is actually preferable; it acts like a sponge, soaking up the custard without turning mushy. If your bread is fresh, cube it and let it sit on a sheet pan for 2–3 hours or give it a light toast at 300 °F for 15 minutes.
For the ham, I reach for a thick-cut, rosemary-roasted deli ham (about ½-inch slices). Avoid water-added supermarket brands—they weep liquid and dilute flavor. If you have leftover holiday ham, even better; dice it into ½-inch pieces so every bite has a smoky pop.
Root vegetables are the sleeper hit. I roast a trio of parsnips, carrots, and golden beets with olive oil, salt, and a whisper of maple syrup until the edges caramelize. The natural sugars concentrate, giving the strata a candied depth that plays beautifully against the salty cheese. If parsnips aren’t your thing, swap in celery root or even sweet potato—just keep the total weight around 1 pound so the strata doesn’t become too wet.
Cheese is a two-part harmony: Gruyère for nutty meltability and sharp white cheddar for tang. Buy blocks and grate them yourself; pre-shredded cellulose-coated cheese refuses to melt smoothly. A modest handful of grated Parmesan on top creates the crackly lid that guests fight over.
The custard is simple—whole eggs, whole milk, a splash of cream for richness, Dijon for zip, and a pinch of nutmeg for holiday perfume. I season aggressively with salt and pepper; cold dairy dulls flavor, so taste the mixture and err on the side of slightly over-salted.
How to Make Holiday Brunch Strata with Ham, Cheese & Root Vegetables
Roast the vegetables
Preheat oven to 425 °F. Toss 2 medium parsnips (peeled and ½-inch dice), 2 medium carrots (same cut), and 1 medium golden beet (peeled and ½-inch dice) with 2 Tbsp olive oil, 1 tsp kosher salt, ½ tsp black pepper, and 1 tsp maple syrup. Spread on a parchment-lined sheet pan and roast 20 minutes, stir, then roast another 10–15 minutes until edges are bronzed. Cool completely.
Prep the custard
In a large bowl whisk 8 large eggs, 2 cups whole milk, ½ cup heavy cream, 2 Tbsp Dijon mustard, 1 tsp kosher salt, ½ tsp black pepper, ¼ tsp freshly grated nutmeg, and 1 Tbsp chopped fresh thyme until homogeneous. Cover and refrigerate while you assemble the rest—this resting time hydrates the thyme and lets the flavors meld.
Build the base
Butter a 9×13-inch ceramic or glass baking dish. Cube 1 pound day-old sourdough into rough 1-inch pieces (about 10 cups). Scatter half the bread in the dish, followed by half the roasted vegetables, 6 oz diced ham, 1 cup shredded Gruyère, and ½ cup shredded white cheddar. Repeat the layers, ending with cheese on top for maximum browning.
Flood with custard
Slowly pour the custard over the layers, pressing with a spatula to submerge every cube. The liquid should come just to the top of the bread; if it looks skimpy, whisk together 1 extra egg with ½ cup milk and add. Cover tightly with buttered foil (butter side down prevents sticking) and refrigerate at least 4 hours or up to 24.
Bake low and slow
The next morning, remove the strata from the fridge 30 minutes before baking. Preheat oven to 350 °F. Bake covered for 30 minutes, then uncover, sprinkle ¼ cup grated Parmesan over the top, and bake another 25–30 minutes until puffed, golden, and the center registers 195 °F on an instant-read thermometer. Let rest 10 minutes to set the custard.
Serve like a pro
Run a thin knife around the edges, then cut into 12 squares. Use a silicone spatula to lift each piece—this keeps the layers intact. Garnish with chopped chives or parsley for color and serve with cranberry compote or a crisp green salad.
Expert Tips
Check the temp
A strata is perfectly set when the internal temp hits 195 °F. Any hotter and the custard squeezes out; any cooler and you’ll have a soggy middle.
Prevent weepiness
Pat roasted vegetables dry if they look oily or wet before layering; excess moisture puddles at the bottom.
Freeze portions
Cool completely, cut into squares, wrap individually, and freeze up to 2 months. Reheat in a 325 °F oven for 20 minutes.
Overnight is best
The 12-hour soak produces the creamiest interior; 4 hours works in a pinch, but the bread won’t be as custardy.
Flip halfway
For extra-crispy tops, rotate the dish 180° after uncovering so the back corners brown evenly.
Color pop
Use rainbow carrots or chioggia beets for a festive confetti look under the cheese.
Variations to Try
- Vegetarian: Replace ham with 8 oz sautéed cremini mushrooms and ½ cup toasted pecans for umami crunch.
- Spicy: Swap cheddar for pepper jack and fold in 1 cup roasted poblano strips.
- Seafood: Use smoked trout instead of ham and add ¼ cup chopped fresh dill to the custard.
- Light: Substitute half-and-half for heavy cream and use 2% milk; add an extra egg white for structure.
- Gluten-free: Replace sourdough with a sturdy gluten-free baguette and reduce milk by ¼ cup (GF bread absorbs less).
Storage Tips
Refrigerator: Cool leftovers, cover tightly, and refrigerate up to 4 days. Reheat individual squares in the microwave 45–60 seconds or in a 325 °F oven 12 minutes.
Freezer: Wrap cooled squares in plastic wrap then foil; freeze up to 2 months. Thaw overnight in the fridge before reheating.
Make-ahead: Assemble through step 4, cover with buttered foil, and refrigerate up to 24 hours. Add 10 extra minutes to the covered bake time if starting cold.
Frequently Asked Questions
Holiday Brunch Strata with Ham, Cheese & Root Vegetables
Ingredients
Instructions
- Roast vegetables: Preheat oven to 425 °F. Toss parsnips, carrots, and beet with olive oil, maple syrup, 1 tsp salt, and ½ tsp pepper. Roast 30–35 minutes until caramelized; cool.
- Make custard: Whisk eggs, milk, cream, Dijon, remaining salt & pepper, nutmeg, and thyme. Chill.
- Assemble: Butter a 9×13-inch dish. Layer half the bread, half the vegetables, all the ham, half the Gruyère and cheddar. Repeat layers; top with remaining cheese.
- Soak: Pour custard evenly. Press to submerge. Cover with buttered foil; refrigerate 4–24 hours.
- Bake: Remove from fridge 30 min early. Bake at 350 °F covered 30 min, uncover, sprinkle Parmesan, bake 25–30 min more until puffed and 195 °F.
- Serve: Rest 10 min, cut into 12 squares, garnish with chives.
Recipe Notes
Strata can be assembled up to 24 hours ahead. Leftovers freeze beautifully—wrap individual squares and reheat at 325 °F for 20 minutes.
