Spinach Strata - BriarPatch Food Co-op

Ingredients

• 1 lb bag frozen spinach, thawed/squeezed dry
• 3 Tbsp unsalted butter
• 1 large yellow onion, chopped
• 3 garlic cloves, minced
• 12 oz. artisan bread, cut into 1-inch cubes (about 8 cups)
• 1 ½ cups Gruyère, coarsely-grated
• 2/3 cup finely-grated Parmesan cheese
• 9 eggs
• 2 ¾ cups half and half
• 2 Tbsp Dijon mustard
• ½ tsp dried thyme
• 1 ¾ tsp salt
• ¾ tsp pepper ¼ tsp nutmeg