Salt & pepper tofu skewers

Name: Salt & pepper tofu skewers
Cook time: 45 min
Total time: 45 min
Cuisine: Asian
Ingredients: 6 shallots; 1 bunch of spring onions; 2-3 fresh red chillies; 8 cloves of garlic; 5cm piece of fresh ginger; groundnut oil; 4 tablespoons black peppercorns; 1 tablespoon Szechuan peppercorns; 2 teaspoons coriander seeds; 1 teaspoon sea salt flakes; 4 tablespoons soy sauce; 3 tablespoons light brown sugar; 750 g firm tofu; 1 cucumber; ½ a bunch of fresh coriander; 2 tablespoons rice wine vinegar