Pepper steak stir fry

How do I sauté beef for a tender texture?
Ingredients : 2 peppers, beef 150g, Onion 50g, 3 cloves of garlic, Ginger 10g, 1 pinch of powder of five perfumes or white pepper, Olive oil, Salt, dark soy sauce. light soy sauce，corn starch.
Sausage roll
• Saucisse briochée