Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat.
Add shrimp, season lightly with salt and pepper, and cook until pink and opaque, about 2–3 minutes per side. Remove shrimp and set aside.
In the same skillet, add remaining vegetable oil and garlic. Sauté until fragrant, about 30 seconds.
Push garlic to the side and pour in beaten eggs. Scramble until just set, then mix with garlic.
Add cooked rice, peas and carrots, and green onions. Stir-fry for 2–3 minutes, breaking up any clumps of rice.
Return cooked shrimp to the skillet and add soy sauce, oyster sauce, and sesame oil. Toss until everything is evenly coated and heated through.
Adjust seasoning with salt and pepper as needed.
Serve hot in bowls, garnished with optional sesame seeds or extra green onions.