Banh mi-style steak sandwich recipe

Ingredients

• 200 ml fish sauce
• 2 garlic cloves, finely chopped
• 2 birdseye chillies, finely chopped, plus extra, finely sliced, to serve
• 500 gm skirt steak, trimmed
• Vegetable oil, for drizzling
• 200 gm mayonnaise
• Juice of 1 lime, plus extra wedges, to serve
• 8 slices sourdough bread or crusty white loaf
• Mint and coriander, to serve
• 250 ml rice vinegar (1 cup)
• 60 ml fish sauce (1/4 cup)
• 40 gm caster sugar
• 1 birdseye chilli, thinly sliced
• 1 garlic clove, finely chopped
• 2 carrots, cut into julienne