Peel and thinly slice the garlic and ginger, and chop the scallions into chunks as long as their diameter (to match the chicken cubes).

NPR: Savoring The Spice In Kung Pao Chicken

Slice open a garlic clove, and you've released nearly 100 sulfur-containing compounds.

FORBES: Next Step For Garlic Lovers? Connoisseurship