Asparagus Mushroom Strata
Overnight Asparagus Mushroom Strata is a layered breakfast casserole made with bread, eggs, cheese, asparagus, and mushrooms. The ingredients soak overnight in a rich custard mixture, creating a soft and flavorful baked dish. When baked, the strata develops a golden crust while remaining tender inside. This recipe is ideal for brunch gatherings, holidays, or weekend breakfasts. Its make-ahead preparation saves time and reduces morning cooking stress. With its delicious vegetable flavors and comforting texture, it is a perfect vegetarian breakfast option.
Ingredients
- 4 cups cubed crusty bread (day-old works best)
- 1 bunch asparagus, trimmed and cut into 1-inch pieces
- 1 cup sliced mushrooms
- 1 cup shredded Gruyère or Swiss cheese
- 6 large eggs
- 1½ cups milk or half-and-half
- ½ cup diced onion
- 2 cloves garlic, minced
- 1 tablespoon olive oil
- ½ teaspoon salt
- ¼ teaspoon black pepper
- ¼ teaspoon nutmeg (optional)
- 2 tablespoons chopped fresh parsley or chives
Instructions
- Cook vegetables: Heat olive oil in a skillet over medium heat. Sauté onion and garlic for about 2 minutes. Add mushrooms and asparagus and cook for another 3–4 minutes until slightly tender.
- Prepare baking dish: Grease a 9×13-inch casserole dish.
- Layer bread: Spread half of the cubed bread evenly in the dish.
- Add vegetables: Sprinkle half of the sautéed vegetables over the bread.
- Add cheese: Sprinkle half of the shredded cheese on top.
- Repeat layers: Add remaining bread, vegetables, and cheese.
- Mix custard: In a bowl, whisk together eggs, milk, salt, pepper, and nutmeg.
- Pour mixture: Pour the egg mixture evenly over the layered ingredients.
- Refrigerate overnight: Cover and refrigerate for at least 8 hours.
- Bake: Preheat oven to 375°F (190°C) and bake uncovered for 35–40 minutes until the top is golden and the center is set.
- Serve: Let rest for 5–10 minutes before slicing and garnish with fresh herbs.
Notes
- Day-old bread absorbs the custard best.
- Gruyère cheese adds a rich nutty flavor.
- Spinach can be added for extra vegetables.
- The casserole puffs slightly while baking.
- It can be prepared up to 24 hours ahead.
- Allow it to rest before serving for easier slicing.
- Whole milk creates a creamier texture.
- The strata can be stored in the refrigerator for up to 3 days.