Heat oil in a pan. Add onion, garlic cloves, green chile and saute till onion becomes translucent.
1 tablespoon Olive oil , ½ Onion, 2 Garlic cloves, 1 Green chile
Add mushroom, capsicum, carrot, and celery and saute till the veggies are crisp and cooked on medium-high flame.
3 to 4 Mushrooms, ½ Bell pepper, 1 Carrot chopped lengthwise, 1 Celery chopped
Add the black beans, frozen green peas and, sweet corn, salt, red chili powder, and lemon juice and mix well. Saute for a minute.
¼ cup Frozen Green Peas, ¼ cup Frozen Sweet corn, 16 oz Black Beans, ½ to 1 teaspoon Salt, ½ to 1 teaspoon Red chili powder or Cayenne, 1 tablespoon Lemon Juice