Dice the onion and measure the spices and other ingredients so they are ready.
In a large skillet, melt 1 tablespoon butter over medium heat.
Add 1 cup long grain white rice, the diced onion, 1 cup corn, 1/2 teaspoon garlic powder, 1/2 teaspoon cumin, and 1/4 teaspoon chile powder to the skillet. Stir to combine and sauté 2–3 minutes, stirring frequently, until the onion is translucent and the rice begins to toast.
Pour in 1½ cups chicken broth and the 10 ounces ROTEL tomatoes with green chiles (include the juices). Stir, then bring the mixture to a boil over medium-high heat.
Once boiling, reduce the heat to low, cover the skillet, and simmer 20 minutes, or until the rice is tender and the liquid is absorbed.
Remove the skillet from heat, uncover, and fluff the rice with a fork. Squeeze the juice of 1 lime evenly over the rice and gently stir to combine.
Chop cilantro and sprinkle it over the rice before serving.