Holiday Breakfast Casserole

Bahan-bahan (10 porsi)

• 1 package (6 whole) Thomas' Original English Muffins
• ½ tablespoon olive oil
• 1 medium sweet onion, (chopped finely)
• 1 medium red bell pepper, (chopped finely)
• 1 medium green bell pepper, (chopped finely)
• 2 cups finely chopped ham
• 8 ounces shredded sharp cheddar cheese
• 8 large eggs
• 2 cups whole milk
• 1 teaspoon Dijon mustard
• ¼ teaspoon salt
• ½ teaspoon pepper