SEASON pork, if desired, with salt and pepper. Combine oil with chili powder in large bowl; add pork and toss to coat.
HEAT large nonstick skillet over medium-high heat and cook pork, stirring frequently, until pork is done, about 3 minutes. Remove and set aside.
STIR 2 cups water, Knorr® Fiesta Sides™ - Mexican Rice and hominy into same skillet and cook according to package directions, stirring in spinach and pork during last 2 minutes of cook time. Serve, if desired, with lime wedges and chopped cilantro.