Creole Chicken Loaf

Ingredients

• 1 1/2 cups finely chopped onions
• 1 garlic clove, minced
• 1 cup finely diced celery
• 1 tablespoon unsalted butter plus 1/4 teaspoon butter for greasing pan
• 1 large egg
• 1/2 cup heavy cream
• 1/4 teaspoon cayenne pepper, or to taste
• 1 teaspoon file powder (optional)
• 1 teaspoon dried oregano
• Salt to taste
• 1 1/2 pounds chicken breast, deboned, skinned, trimmed of fat and ground
• 1 1/2 cups fine dry bread crumbs
• 1/2 cup finely chopped sweet red pepper
• 1/2 cup finely chopped green pepper
• 1 small carrot, grated
• 1 1/2 cups finely chopped fresh tomatoes, seeds removed