Creamy Trout Mousse

• 6 as an appetizer
• 3 as a lunch (light)
• 2 trouts
• 2 egg (white)
• 1 parsley (fresh)
• 1/2 cucumber
• 230 gr flesh (cooked)
• 110 gr olive
• 75 ml creamy yoghurt
• 7 gr gelatine powder