Remove the soya chaap sticks from the stick and place them in a bowl.
In a large mixing bowl, combine vegan yogurt (optional), ginger-garlic paste, lemon juice, mustard oil, red chili powder, turmeric, garam masala, and salt. Mix well to prepare the marinade.
Cut the soya chaap into bite-sized pieces and add them to the marinade. Ensure all pieces are well-coated. Let them marinate for 1–2 hours.
Preheat the grill or oven to 220°C. Skewer the marinated chaap pieces and grill or bake for 15–20 minutes, turning halfway through, until they develop a charred appearance.
Garnish with fresh coriander and lemon wedges. Serve hot with mint chutney.