Best ever bean and tuna salad

Ingredients

• 125g baby spinach leaves
• 375g can or fresh hydrated cannellini beans, drained (or any bean will do)
• 375g can tuna in oil, drained
• 1 fresh cucumber, chopped
• 2 tomatoes, chopped
• 1 red capsicum, sliced (optional)
• 2 tablespoons chopped Italian parsley
• 2 tablespoons olive oil
• 2 tablespoons lemon juice
• cracked black pepper