Step 1: Prepare the Kabab Mixture : In a large bowl, combine blanched spinach, boiled peas, and mashed potatoes. Add grated paneer (optional), chopped onions, green chilies, ginger-garlic paste, garam masala, cumin powder, chili powder, and salt. Mix thoroughly. Add cornstarch or breadcrumbs to help bind the mixture.
Step 2: Shape the Kababs : Divide the mixture into 6–8 equal portions. Shape each portion into round or oval patties, about 1/2 inch thick.
Step 3: Cook the Kababs : Heat oil in a non-stick skillet over medium heat. Shallow fry the kababs for 3–4 minutes per side, until golden brown and crisp. Remove and place on paper towels to drain excess oil.
Step 4: Prepare Mint Yogurt Sauce : In a blender, combine yogurt, mint leaves, coriander leaves, green chili, lemon juice, salt, and water. Blend to a smooth, creamy consistency. Adjust water to get desired thickness.