Start by gathering all your ingredients and prepping them. Mince the shallot and garlic, and chop the green onion. Ensure leftover rice is cold.
In a large skillet or wok, heat 1 tablespoon of avocado oil over medium-high heat. Swirl the oil around to coat the surface evenly.
Add the egg to the skillet and scramble it until fully cooked. Transfer it to a plate and set aside.
In the same skillet, add the remaining tablespoon of oil. Add the minced shallot and garlic, sautéing for about 30 seconds until fragrant.
Add the mixed frozen vegetables to the skillet. Stir-fry for about 2-3 minutes until heated through and tender.
Add the leftover cooked rice, breaking up clumps with your spatula, and stir everything together until well combined.
Drizzle in the soy sauce and sesame oil. Stir to ensure the rice is evenly coated. Season with black pepper to taste.
Add the scrambled egg back into the skillet and stir to combine. Toss in the chopped green onion, stirring briefly to mix.
Remove from heat, serve in bowls, and enjoy your homemade Vegetable Fried Rice!