Tuna bowl, small vegetables and cold mustard sauce - Reine de Dijon

Ingredients

• 2 salmon steaks
• 100g of pasta of your choice
• 150g canned tuna in brine
• 1 avocado
• 1/2 yellow lemon
• 4 small ears of canned corn
• 1 tomato
• 6 radishes
• 1/3 cucumber
• some spinach leaves
• 8 mozzarella balls
• 2 petits Swiss
• 15g Dijon mustard
• Salt, pepper