Danish Creamery : Crab Strata Florentine

Ingredients

• 8 cups cubed (1-inch) Italian or French bread
• ½ pound fresh crabmeat or 2 cans (6 ounces each) crabmeat, drained
• 6 Tablespoons Danish Creamery Butter (¾ stick)
• ½ cup chopped onion
• 4 cups coarsely chopped fresh spinach
• 1½ cups grated Cheddar cheese
• ½ cup grated Parmesan cheese
• 2 cups low-fat milk
• 7 eggs, beaten
• 1 teaspoon dry mustard
• ¼ teaspoon salt
• ¼ teaspoon black pepper
• ⅛ teaspoon thyme leaves