Mediterranean-Style Beef Skewers

Ingredients

• 675 g (1 ½ lb) skirt (or flank) steak, cut into cubes
• ½ tsp ground sumac (or 1 tsp grated lemon zest) (see note)
• 2.5 ml (½ tsp) coriander seeds, ground
• 2.5 ml (½ tsp) salt
• 2 garlic cloves, chopped
• 2 tbsp (30 ml) olive oil
• 2 bell peppers, various colours, seeded and cubed
• 4 small green zucchini, cubed
• 24 cherry tomatoes, various colours
• 2 tbsp (30 ml) olive oil
• 8 long wooden skewers soaked for 30 minutes in water or metal skewers
• Store-bought hummus
• 1 lemon, cut into wedges