Seaside Breakfast Casserole

Ingredients

• 8 large eggs
• 2 cups half-and-half
• 2 (6-ounce) cans crabmeat, drained
• 1 (10-ounce) package frozen chopped spinach, thawed and squeezed thoroughly
• 1 cup breadcrumbs
• 1 cup Swiss cheese, shredded
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• 1/4 teaspoon ground nutmeg
• 2 celery ribs, chopped
• 1/2 cup onion, chopped
• 1/2 cup sweet red pepper, chopped
• 3 medium fresh mushrooms, chopped
• 2 tablespoons butter