Tuna on Rye with Pickled Onions and Avocado - Bumble Bee Seafood

Ingredients

• 1 red onion, thinly sliced
• 1 cup distilled white vinegar
• 1 teaspoon fine sea salt or table salt
• 1 teaspoon sugar
• One 5oz can Bumble BeeⓇ Solid White Albacore Tuna in Water, drained
• ¼ cup mayonnaise
• ¼ cup finely diced celery
• 2 teaspoons dill pickle relish
• 2 teaspoons minced fresh dill
• 1 teaspoon stone-ground or spicy brown mustard
• ¼ teaspoon black pepper
• ½ garlic clove, minced or pressed