Italian Sausage Sandwich with Florida Orange Mustard

Ingredients

• 2 cups Florida Orange Juice
• 2 tsp. Florida Orange zest
• ½ cup breadcrumbs
• 1 ½ lbs. pork butt, cut into 1-inch cubes
• ½ lb. pork fat, cut into 1-inch cubes
• 2 tsp. garlic powder
• 1 tsp. ground coriander seeds
• 1 tsp. ground fennel seeds
• ½ tsp. red chili flakes
• 1 tbsp. oregano
• 2 tbsp. salt
• 1 tsp. black pepper
• 2 tbsp. Florida Orange Juice reduction (reserved, see recipe)
• 1 tsp. Florida Orange zest
• ¼ cup Dijon mustard
• ¼ cup whole grain mustard
• 2 tbsp. fresh chopped chives
• 1 loaf sourdough bread, cut into ¾-inch slices
• Olive oil as needed