Preheat your oven to 375°F and get an 8 x 11-inch (or 9-inch) baking pan ready.
Cut the zucchini in half lengthwise and scoop out the insides until they're about ¼ inch thick, saving the chopped zucchini. If the zucchini flesh is too watery, pat them dry with a kitchen towel.
2 medium zucchini
Place the zucchini halves cut side up on the baking sheet and spray them with cooking oil. Sprinkle salt and pepper on top. Bake for 15 minutes.
salt and black pepper
While the zucchini are baking, cook the onion in a skillet over medium heat for 2 minutes. Then add the beef and cook until it's no longer pink, breaking it apart with a spatula. Drain excess grease if necessary.
olive oil, ¼ cup onion, ½ pound ground beef
Stir in the taco seasoning, water, salsa, corn, beans, and the reserved zucchini flesh. Cook until the liquid has cooked off, about 5-7 minutes.
2 tablespoon water, ½ cup salsa, ¼ cup black beans, ¼ cup corn, ½ tablespoon taco seasoning
Take the zucchini boats out of the oven and fill them with the cooked mixture. Sprinkle cheese on top.
½ cup cheddar
Put them back in the oven until the cheese melts. Serve with freshly chopped parsley or cilantro.
1-2 tablespoons cilantro