In a mixing bowl, whisk together the olive oil, adobo sauce, smoked paprika, garlic powder, onion powder, salt, and pepper. Add the chicken thighs to the mixture, ensuring they are well-coated. Cover and let marinate in the refrigerator for at least 30 minutes, or ideally overnight.
Rinse the brown rice under cold water until the water runs clear. In a medium saucepan, combine the rinsed rice with 2 cups of water and a pinch of salt. Bring to a boil over medium-high heat, then reduce heat to low, cover, and simmer for about 35-40 minutes until tender. Fluff with a fork and set aside.
Preheat a grill or skillet over medium-high heat. Remove the chicken from the marinade and cook for 6-7 minutes on each side until fully cooked through. Let rest for 5 minutes before slicing into strips.
In a mixing bowl, combine the corn, black beans, halved cherry tomatoes, and chopped cilantro. Squeeze lime juice over the mixture and toss well. Season with salt to taste and set aside.
To assemble, start with a base of brown rice in each bowl. Layer sliced chicken on top, followed by the corn and black bean mixture. Arrange avocado slices over the top.
Finish each bowl with a dollop of sour cream or Greek yogurt, if desired.
Notes
Serve with lime wedges and cilantro for added flavor.