Tuna Salad Avocado Bowls

Ingredients (8)

• 2 tbsp chopped toasted walnuts or other nuts
• 1 tsp lemon zest
• 1 tbsp chopped green olives
• 2 tbsp chopped scallions or other onion
• 1 tsp olive oil
• 2 tbsp plain nonfat Greek yogurt
• 6 oz canned tuna or salmon, packed in water drained
• 1 large avocado slice in half, pit removed