Preheat the oven to 375 degrees F.

Place the halved peppers on a lined sheet pan, spread 1 tbsp oil, salt, and pepper on each pepper and bake for 25 minutes till softened.

In a large pan with olive oil sauté onions until slightly browned.

Add garlic, mushrooms and zucchini.

Continue to cook until vegetables are soft and take on a caramel brown hue.

Add taco seasonings and up to two tablespoons water if you need it to help incorporate the taco seasonings.

Add a pinch or two of cayenne pepper and taste. Add additional pepper, up to one teaspoon at a time, until you get to a spiciness you like.

Mix in tomatoes.

Add to pre-baked pepper halves.

Bake for 15 minutes, unit pepper is soft.

Garnish with cilantro or green onion and serve hot.