Vegetarian Breakfast Strata

view of sliced baked vegetarian breakfast strata in white rectangle casserole dish

5 from 2 reviews

This Vegetarian Breakfast Strata is the perfect overnight casserole. Serves a crowd, great for entertaining, and the vegetables can be customized to your liking. Luscious egg-soaked baguette bites and cheese – you can’t pass this up!


Units Scale
  • butter, for greasing the pan
  • 1 (14 ounce) day old baguette, cubed or torn
  • 1/2 tablespoon olive oil
  • 1 small onion, diced
  • 2 cloves garlic, minced
  • 1 red bell pepper, diced
  • 1 package baby bella mushrooms, sliced
  • 1 small bunch kale, finely chopped, about 2” pieces (equal to about 4 cups),
  • 12 large eggs
  • 3 cups milk
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper
  • 1 cup sharp white cheddar cheese
  • 1/2 cup shaved parmesan cheese


  1. Grease a 9×13 casserole dish with butter and set aside.
  2. Prepare bread: Slice day old baguette into 1” cubes and place in bottom of baking dish. If bread is not stale, just slice into 1” slices and toast in oven at 300ºF for 5-8 minutes.
  3. Prepare vegetables: In a large skillet over medium heat, add oil, onions and garlic. Cook for about 3-4 minutes, stirring occasionally. Add bell pepper, mushrooms and kale, cooking down for another 4-5 minutes, until kale is wilted. Remove from heat and set aside.
  4.  Mix egg custard: In a large bowl, whisk together eggs, milk, salt and pepper.
  5. Layer in: Add the skillet veggie mixture over top of the cubed bread, tossing to evenly combine. Sprinkle on ½ cup of the white cheddar cheese. Pour egg mixture over bread and veggies, making sure all bread pieces are fully coated in mixture. Add parmesan cheese and the rest of the white cheddar cheese. Cover and refrigerate for at least 4 hours (up to 12 hours max).
  6. Bake: Remove casserole from fridge and preheat oven to 375ºF. Re-position bread and make sure all pieces are coated still. Bake uncovered for 45-55 minutes, until edges are golden and strata has puffed up. Cool for 5 minutes, then slice and enjoy!


Refer to post for more flavor variations and ideas.

STORAGE – Leftovers will keep in the fridge, covered with plastic wrap or in an airtight container, for up to 4 days.

REHEAT – Place in the toaster oven for 5 minutes, or in the microwave for 30-45 seconds per piece. To reheat the entire casserole, place it in a preheated oven set to 325 degrees F, tented with aluminum foil, for 20-25 minutes, or until warm.

Keywords: breakfast strata, vegetarian breakfast casserole, Christmas breakfast ideas