What ingredients go first in stir-fry?
How to stir fry step by step?
Heat 1 tablespoon oil in a 12-inch skillet or wok over medium-high heat until the oil shimmers.
Add the garlic, if using. if using. Cook and stir for 15 secon 
Add the vegetables. Cook, stirring constantly with a wooden spoon or heatproof silicone spatula ($12, OXO), for 2 to 4 minutes or until the vegetables are crisp-tender. Remove the vegetables from the pan
If needed, add more oil to the pan.  Add the meat. Cook and stir until the meat is cooked through. (If necessary, cook the meat in batches to prevent overcrowding. If the pan is too full, the meat will water out and steam instead of fry 
Push the cooked meat from the center up the sides of the wok or skillet. Add the sauce to the center of the skillet. Cook and stir the sauce until bubbly. 
Return all vegetables to the skillet.