Heat 2 tablespoons oil in a large nonstick skillet over medium heat until warm. Add kimchi (and the kimchi juice!) to one side of the skillet and raw ground meat (if using) to the other side. Add gochujang. Cook the kimchi and the meat separately on each side of the skillet until the surface of the meat is cooked, about 2 minutes. Carefully spread and mix gochujang with the other ingredients, so it won’t end up a lump in the dish. Mix everything together and continue to cook until the meat is cooked through.
(Optional) If you’re using cooked meat, add it after the kimchi is cooked. Cook for a minute until the meat is heated up.
(Optional) If you’re using carrots, frozen peas, or cucumbers, add them now and cook until the veggies are almost cooked through. I personally prefer to move the kimchi and meat to one side of the skillet, add a bit of oil to the other side, and cook the veggies there. This way the veggies will cook through more easily.
Separate the rice into smaller chunks and add it into the skillet. Cook and chop rice with spatula for 1 minute. Swirl in soy sauce. Keep chopping and mixing until rice is mixed well with the rest of the ingredients and the grains are well separated, 2 to 3 minutes.
(Optional) If you are using eggs, add them now. Move all the ingredients to one side of the skillet and add a bit of oil to the other side. Pour beaten eggs onto the oil. Cook and stir until half cooked. Mix everything together (the image is taken from another recipe).
(Optional) If you’re using bell pepper, spinach (cooked or raw), or cabbage (make sure to cut it into thin slices), add it now. Move all the ingredients to one side of the skillet and add a bit of oil to the other side. Add veggies and cook briefly. Mix everything together.
Turn to lowest heat. Taste the rice and adjust seasoning by adding more salt if needed. If the dish is too spicy, add 1 or 2 teaspoons sugar and mix well. This will help balance the heat.
Transfer everything to serving bowls.
(Optional) Add grated or sliced cheese on top of the rice and let the residual heat melt the cheese.
(Optional) If you’re serving the rice with sunny side up eggs, cook the eggs now in another nonstick skillet. Top the cooked egg on the fried rice.
Serve warm.