Cheesy Breakfast Egg Strata Recipe

Ingredients

• 2 tablespoons olive oil (plus more for the baking dish)
• 1 (16-ounce) French baguette (cubed)
• 1 onion (thinly sliced)
• 1 teaspoon salt (divided)
• 1 teaspoon black pepper (divided)
• 1 (8-ounce) container baby bella mushrooms (sliced )
• 6 cups kale (chopped )
• 2 teaspoons Italian seasoning
• 10 eggs
• 2 cups milk
• 1 ½ cups shredded cheddar cheese (divided)