Bring a pot of lightly salted water to a boil. Add the green beans and blanch for 2 minutes until al dente. Remove, drain, and plunge into an ice bath to stop them cooking.
Add all of the Korean cucumber salad ingredients to a bowl and mix well to combine. Store in the fridge until ready to serve.
Add the washed jasmine rice, cold water, and salt to a saucepan and bring to a boil. Reduce the heat to low, cover with a lid, and cook for 12 minutes. Turn off the heat and leave covered for 4 minutes. Remove the lid and fluff the rice with a fork. Set aside.
Place a large pan over medium-high heat. Add the oil and onion and sauté for 4 minutes, mixing regularly. Add the garlic and cook for 1 minute. Add the beef mince and let it sit for 2 minutes to build a crust. Mix and break up the meat, cooking for 6 minutes, or until the internal temperature reaches 71°C (160°F) and the beef is no longer pink.
Add the blanched green beans, spring onion, sweet chilli sauce, oyster or hoisin sauce, and soy sauce, and mix well to combine. Cook for 1½–2 minutes, or until the sauce has thickened. Check the seasoning and remove from the heat.
Place the cooked jasmine rice into 5 x 750ml meal prep containers. Add the sticky beef and Korean cucumber salad. Top with a sauce of choice. Dig in.