Heat 1 tablespoon olive oil in a large skillet over medium heat.
Add the chopped onion, chopped bell pepper, and minced garlic to the skillet; season with a pinch of salt and pepper and cook until softened, about 5 minutes.
Stir in the shredded chicken, smoked paprika, chili powder and cumin; season with another pinch of salt and pepper and cook 2–3 minutes to bloom the spices.
Add the rinsed quinoa, drained black beans, corn, salsa, and 2 cups chicken stock; bring to a boil.
Reduce heat to low, cover the skillet, and simmer for 15 minutes. Remove the lid, stir, and if liquid remains, continue to cook uncovered for up to 5 more minutes until the quinoa is tender and liquid is absorbed.
Stir in 1 cup grated cheddar cheese until melted and combined.
Prepare the avocado pico: combine cubed avocados, 1/2 cup diced tomatoes, 1/4 cup diced red onion, 1/2 cup chopped cilantro and juice of 2 limes in a bowl; season with salt and pepper to taste.
Spoon the salsa chicken quinoa into bowls and top with avocado pico and desired toppings (green onions, sour cream, cotija and extra salsa); serve with lime wedges to spritz.