In a mixing bowl, combine masa harina, baking powder, and salt. Gradually add vegetable broth and melted coconut oil, mixing until a dough forms.

Knead the dough for a few minutes until smooth, then cover and let it rest for 30 minutes.

In a pot, heat olive oil over medium heat. Sauté onion and garlic until translucent.

Add shredded jackfruit, chili powder, cumin, salt, corn, and bell pepper. Cook for about 10 minutes, stirring occasionally.

Take a small portion of dough and flatten it in your hand. Place a spoonful of jackfruit filling in the center and fold the dough around it.

Wrap the tamale in a corn husk and tie it with a string. Repeat until all dough and filling are used.

Place the tamales upright in a steamer and steam for about 60 minutes, or until the dough is firm.