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Ingredients
- 1 loaf rustic bread, cut into 1-inch cubes
- 2 Tbsp. unsalted butter (plus more for greasing)
- 1 medium onion, diced
- 3 cloves garlic, minced
- 8 cups spinach (fresh or frozen and thawed)
- 1 tsp. kosher salt
- ½ tsp. black pepper
- 2 tsp. chopped fresh thyme
- 6 large eggs
- 3 cups whole milk
- 1 cup heavy cream
- 1 ½ cups ricotta
- 1 ½ cups shredded mozzarella
- ½ cup shredded Parmesan cheese
- 2 Tbsp. chopped fresh parsley (for garnish)
Instructions
- Preheat the oven to 350 degrees.
- Grease a 9x13-inch baking dish well with butter and set aside.
- Line a separate baking sheet with parchment.
- Spread the bread cubes in an even layer onto the prepared baking sheet and bake until golden-brown and lightly toasted, about 5–8 minutes.
- Remove from the oven and transfer to the prepared baking dish in an even layer.
- In a large skillet over medium heat, melt the butter.
- Add the onion and cook until softened, about 5 minutes.
- Add the spinach, salt, pepper and thyme and cook until the spinach is wilted and most liquid evaporates, about 3–4 minutes.
- Add the garlic and cook until fragrant, about 1 minute.
- Remove from the heat and let the mixture cool slightly.
- In a separate small bowl, combine the ricotta and the spinach mixture until all ingredients are evenly distributed.
- In a medium bowl, whisk together the eggs, milk and cream until you have a smooth custard.
- Fold in the mozzarella, Parmesan cheese and half of the ricotta mixture until smooth.
- Pour the custard mixture over the bread cubes in the prepared baking dish, pressing down gently to soak the bread evenly.
- Let the mixture soak for at least 15 minutes.
- Dollop with the remaining ricotta mixture and bake the strata uncovered until golden-brown and the custard is set, about 50–55 minutes.
- Garnish with parsley and serve.

