siggi's Icelandic-style yogurt: skyr - Open Face Smoked Salmon Sandwich

Ingredients

• 2 Tbs siggi’s Plain 0%
• 1/4 cup watercress
• 1/2 red onion, sliced
• 2 slices of rye bread
• salt and pepper to taste
• 3oz smoked salmon
• 1 Tbs capers, optional
• juice of 1/2 lemon