Tuna Tartare With Avocado and Wasabi Mousseline

Ingredients

• 1 ripe avocado
• 1 tbsp (15 ml) lime juice
• 1/2 tsp (2.5 ml) wasabi, or to taste
• 1 green onion, finely chopped
• 1 tbsp (15 ml) lime juice
• 1 tbsp (15 ml) soy sauce
• 1 tsp (5 ml) olive oil, plus more for serving
• 1/2 tsp (2.5 ml) toasted sesame oil
• 1/2 tsp (2.5 ml) wasabi, or to taste
• 1 lb (454 g) very fresh bluefin tuna, finely chopped with a knife
• 2 tsp toasted sesame seeds and/or black sesame seeds
• 1/2 lime, zest finely grated
• 1/2 cup (15 g) baby arugula
• 4 long baguette slices, toasted