Heat a tablespoon of oil in a pan and add ¼ cup sliced onion. Fry the onion for 5 minutes. Take out the fried onion slices and keep it aside for the later use.
Add another tablespoon of oil in a same pan. Add remaining sliced onion. Add ginger and garlic paste. Stir it until the raw smell goes away.
Add chopped bell pepper and mixed vegetables. Mix it and let them cook. Add chopped tomatoes. Mix well. Let the tomatoes and vegetables cook properly.
Get 2 tablespoons of yogurt in a bowl and stir it to remove lumps. Add this beaten yogurt to the vegetables. Stir once again.
Add turmeric powder, red chilli powder, garam masala, salt , 1 tablespoon chopped cilantro, and a tablespoon chopped mint to the vegetables. Give a quick stir.
Once the vegetables are cooked, turn off the flame.