Achari Paneer Tikka

Name: Achari Paneer Tikka
Cuisine: Asian, Indian
Ingredients: 3 tsp split yellow mustard or 1 1/2 tsp whole mustard seeds; 2 tsp fennel seeds; 1-2 tsp nigella seeds; 1/4 tsp fenugreek seeds; 1-3 dry red chillies (remove the seeds and break into small pieces); 300g cottage cheese slice into cubes (squares); 1 medium red capsicum diced; 1 medium onion halved with layers separated; 1 medium tomato diced; 7 Tbs plain yoghurt (full cream); 2 Tbs gram flour or corn starch; 4-5 medium garlic cloves plus 3cm of fresh ginger; 1/2 tsp dry mango powder (or lime juice for tang); 1/4 tsp turmeric powder; 1/2 tsp coriander powder (optional); 1/2 tsp red chilli powder; 1/2 tsp crushed dry fenugreek leaves; 1 tsp mustard oil (or vegetable oil); Salt (as needed); 1 medium onion sliced thinly; 1 small lime sliced; Pinch of masala powder; 1 Tbs chopped coriander or mint leaves (optional)