Pat the cubed chicken completely dry with paper towels. Season with salt, pepper, and cumin. Set aside
Add 1 cup of the chicken broth to the blender with the choclo and cilantro. Blend until you have a creamy, somewhat thick mixture. Set this purée aside.
Heat the olive oil over medium-high heat. Add the cubed chicken in a single layer, working in batches if necessary to avoid crowding. Brown the chicken for 4-5 minutes on each side until golden brown. Transfer the browned chicken to a plate and set aside.
Reduce the heat to medium. If the pot is dry, add a drizzle of olive oil. Add the onions and red bell pepper. Sauté for 8-10 minutes, stirring occasionally, until the onions are soft with golden edges.
Add the minced garlic and cook for another 1-2 minutes, stirring constantly, until fragrant. Add the ají amarillo paste, ají panca or mirasol if using, and remaining ground cumin to the pot. Stir constantly for about 1 minute.
Add the corn and cilantro purée to the pot, stirring well to combine with the onion and spice mixture. Cook for 2-3 minutes, stirring frequently, until the mixture thickens slightly and the raw corn smell dissipates.
Pour about ½ cup of the remaining chicken broth into the pot, scraping up any browned bits from the bottom of the pot. Return the browned chicken to the pot, nestling them into the liquid. The liquid should come about three-quarters of the way up the chicken and vegetables. If needed, add more water or broth.
Cover and simmer 7-8 minutes to cook the chicken through.
To finish, add half and half, and cheese if using. Check for seasoning, and adjust if needed. Return to almost a simmer, but do not boil. Enjoy!