Halloumi, broccoli and spring onion sandwich with lime and coriander mayo

200g Halloumi, in thick slices (4-6 slices)

1 lime, halved

6-8 tender stem broccoli stalks

4 spring onions, green ends cut off

1 garlic clove, sliced thinly

rapeseed oil

50g butter

fresh bread, preferably baguette

For the mayo:

handful of coriander leaves, chopped finely

2 tbsp fresh lime juice

1 garlic clove, crushed

1 tsp Dijon mustard

few drops of tabasco, to taste

180g good quality mayonnaise