Savory Vegetable Bread Pudding

Ingredients

• 1 bunch swiss chard (about 1 lb.)
• 6 large eggs
• 1 cup milk
• 2 teaspoons Dijon mustard
• 1 1/4 teaspoons salt
• 3/4 teaspoon pepper
• 3 cups cubed ciabatta (about 1-inch cubes)
• 1 1/2 cups freshly grated parmesan cheese, divided
• 1 (8 ounce) package sliced fresh mushrooms
• 1 red bell pepper, chopped
• 1 small onion, chopped
• 1 teaspoon minced garlic
• 2 tablespoons olive oil