Stir-fried Beef with Ginger and Spring Onion - Pinch Of Nom

Ingredients

• 500 g rump/sirloin/fillet/topside beef (thinly sliced)
• 2 cloves garlic (finely chopped)
• 2 cm ginger (finely chopped)
• 1 onion (sliced)
• 80 ml oyster sauce
• 3 tbsp soy sauce, (preferably dark)
• 2 tbsp rice vinegar
• 1 tsp granulated sweetener (optional)
• 1 red pepper
• 1 yellow pepper
• 1 green pepper
• 5 large mushrooms (sliced)
• 4 spring onions (sliced)
• 5 baby corn
• low calorie cooking spray