Peel the bananas; then cut them into two-inch pieces and place them inside salted water to avoid discoloration when they come into contact with air.
Place a saucepan over medium heat and add avocado oil to it. Once the oil is hot, add chopped onion and cook for about 2 minutes or until they are translucent and soft. Next, garlic, ginger, bell pepper, and tomatoes and continue to cook for 2 more minutes.
Now, add curry powder, cayenne pepper, bouillon cube, and cilantro, and mix well. Cook for a minute or two until spices are fragrant.
Add the green bananas and mix well.
Pour water and stir. Bring the mixture to a boil and cover the saucepan with a lid. Reduce the heat and let the mixture simmer for about 25 minutes or until the green bananas are tender.
Season with salt and cayenne pepper to taste. Enjoy!