Preheat the Oven: Preheat your oven to 400°F (200°C).
Prepare the Peppers: Drizzle the halved peppers with 1 tablespoon of olive oil and season with salt and pepper. Place them on a baking sheet and roast in the preheated oven for about 15-20 minutes, or until the edges start to char.
Cook the Chicken: While the peppers are roasting, heat the remaining 2 tablespoons of olive oil in a large sauté pan over medium heat. Add the chicken strips and cook for about 5 minutes, or until browned on both sides.
Add Vegetables and Spices: Add the sliced red onion, minced garlic, chili powder, cumin, smoked paprika, salt, and pepper to the pan. Pour in the ¼ cup of water and continue to sauté for another 5-7 minutes, or until the chicken is fully cooked and the onions are softened.
Stuff the Peppers: Remove the peppers from the oven. Fill each pepper half with a layer of cooked rice, followed by the chicken and onion mixture. Sprinkle shredded cheddar cheese over the top.
Melt the Cheese: Return the stuffed peppers to the oven and bake for an additional 10 minutes, or until the cheese is melted and bubbly.
Serve: Garnish with chopped cilantro and serve the stuffed peppers with sliced avocado, tortilla chips, and cherry tomatoes.