1) Heat oil in a large frying pan over medium-high heat. Season both sides of fish with salt and freshly ground black pepper.
2) Add fish fillets to pan and cook 2 minutes per side, flipping with a spatula or tongs, until golden brown and fork-tender. Remove from pan.
3) In a blender, combine roasted red peppers, garlic, lime juice, ginger and cumin and puree until smooth. Transfer mixture to a small saucepan and bring to a simmer, about 5 minutes. Remove from heat and stir in coriander.
Serve half of the fish with all of the sauce spooned over top. Sprinkle the top with toasted sunflower seeds.