Grill the raw rice in a pan until it is golden brown. Then pass it through a coffee grinder to obtain a fairly coarse powder. Cook the pork breast in water, then slice it into strips. Cook the prawns in water or steam for 3 minutes. Roll the pork strips and prawns well in toasted rice flour. Cook the chicken in water or steam, then tear the meat into thin strips along the fibers. Slice the mushrooms, chives, lettuce leaves into strips and carrots into sticks. Finely chop the garlic. Intimately mix all the salad dressing elements. Put the meat, prawns, and vegetables in a large bowl. Garnish with chives and mint leaves. When serving, pour the sauce over the salad and mix.