Begin by preheating the oven to 350 degrees Fahrenheit.
Slice the zucchini in half lengthwise and remove the seeds. Place on a baking sheet and bake in the oven for 20 minutes.
Meanwhile, add the oil to a deep-rimmed pan and sauté the onion and pepper. Then brown the meat, adding in the salt when browning.
To the pan add the taco seasoning and tomato sauce, stir, and cover and simmer for 5 minutes.
Mix in the corn and place the mixture in the zucchini halves, top with cheese, and place back in the oven for 20 more minutes. Enjoy!