Gather all your ingredients and prep them. Dice the onion and carrots, mince the garlic, and measure out the soy sauce.
In a large skillet or wok, melt 1 tablespoon of butter over medium heat. Pour in the beaten eggs and scramble until fully cooked, about 2 minutes. Remove the eggs and set aside.
Add another tablespoon of butter to the same skillet. Once melted, add the diced onion and carrots. Sauté for about 3-4 minutes until translucent. Stir in minced garlic and ginger, cooking for an additional minute until fragrant.
Add the frozen peas and leftover cold rice, breaking up clumps. Mix well and cook for about 5 minutes, allowing to heat through.
Pour in the soy sauce and stir to coat the rice evenly. Taste and adjust the soy sauce if necessary.
Return the scrambled eggs to the skillet and gently fold them into the rice mixture until well combined. Cook for another minute to meld flavors.