Spicy grilled zucchini with curried dip

Ingredients

• ¼ tsp salt
• 2 tbsp lemon juice
• 2 tbsp olive oil
• salt
• 1 tsp fennel seeds
• ½ tsp garam masala
• 2 tbsp chickpea flour
• 3 black peppercorns
• 1 lemon, juice and zest
• ½ garlic clove
• 1/8 tsp white pepper
• 1 tsp coriander seeds
• 1 tsp cumin seeds
• 3 medium zucchinis (about 1.2 kg / 2.5 lb)
• ½ tsp chilli flakes
• fresh coriander, to garnish
• ½ cup cashews, soaked overnight and chopped
• 3 tbsp water
• 1 heaped tsp grated ginger