Easy Breakfast Casserole with Prosciutto Recipe

Ingredients (12)

• 1 tablespoon extra-virgin olive oil
• 1 medium yellow onion, chopped
• 2 big handfuls tender greens, such as arugula, dandelion greens, baby kale, or spinach (tough stems removed)
• 1 1/2 cups asparagus, cut into 3/4-inch pieces
• 1 teaspoon kosher salt, divided
• 3 ounces thinly sliced prosciutto
• 2 packed cups cubed crusty bread, such as levain, baguette, or Italian bread (slightly stale is ok)
• 8 large eggs
• 1 cup low fat cottage cheese
• 1 cup 2% milk (or whatever kind you have in the fridge)
• Freshly ground black pepper
• 1 1/2 cups (3 oz) grated cheddar, divided