Tuna Salad Sandwich with Olives | Nature's Green Grocer

Ingredients

• 1 (5 oz) can white albacore tuna packed in water, drained
• 1 1⁄2 Tbsp mayonnaise
• 1 tsp Dijon mustard
• 1⁄8 tsp ground celery seed
• 2 Tbsp sliced pitted black olives
• 2⁄3 c green leaf lettuce
• 4 slices whole-wheat bread
• 2 slices Swiss cheese
• 4 slices red onion