Karele Pyaz ki Sabzi || how to make onion and bitter gourd

Bitter gourd karela 1/2 kg onions 250 gram or 3 med sliced tomato 250 grams or 3 med sliced green chilies 3 chopped ginger 1 inch julienne ginger/garlic paste 1 tsp full salt 1 tsp cumin seeds 1 tsp red chili pwd 1/2 tsp heaped red chili flakes 1 tbsp c