Smashing Salmon Tacos

• 500 g salmon fillets, skin removed (one fillet per person)
• 170 g plain Greek yoghurt
• 2 tsp sriracha (+ additional to serve)
• 8 wholemeal tortillas
• 300 g cherry tomatoes, halved
• 420 g corn kernels, drained
• 1 avocado, cubed
• 1 lime, to serve (optional)