Season the chicken breast evenly with chili powder, garlic powder, sea salt, and black pepper.
Heat the olive oil in a skillet over medium-high heat and cook the chicken until golden brown and cooked through, about 6 minutes per side.
In a separate dry pan, char the sweet corn over high heat until the kernels are lightly blackened and fragrant.
In a small mixing bowl, toss the cooked brown rice with half of the lime juice and the fresh chopped cilantro.
Whisk the plain Greek yogurt with the remaining lime juice to create a smooth, tangy crema.
Slice the cooked chicken and the avocado into bite-sized pieces.
Assemble the bowl by placing the cilantro-lime rice at the base, followed by the chicken, charred corn, and avocado.
Drizzle the yogurt crema over the top and garnish with extra cilantro if desired.