Bring salted water to a boil in a large pot. Add 200 g whole grain rice, reduce heat to low, and simmer for 35-40 minutes until tender.
While rice cooks, mix 400 g ground beef, 1 egg, and salt in a bowl. Form into small balls.
Heat oil in a large pan over medium-high heat. Add meatballs and fry for 8-10 minutes, turning occasionally, until browned and cooked through (internal temperature 71 °C / 160 °F).
While meatballs fry, combine 200 ml reduced-fat cream, 100 ml low-fat milk, 1 teaspoon curry, 1 tablespoon gluten-free flour, 1 teaspoon salt, and 1/2 teaspoon pepper in a bowl and mix well.
Pour the sauce over the cooked meatballs and simmer over medium heat for 10 minutes.
While sauce simmers, heat roughly 200-300 ml water in a pot over medium-high heat. Add 500 g frozen cauliflower and 250 g carrot sticks and cook for 8-10 minutes until tender.
Drain the vegetables well. Divide cooked rice among plates, add vegetables, top with meatballs and sauce, and serve.