Oyster Mushroom Stir Fry

0 Cut the mushrooms in half lengthwise and place them cut side down.
1 Score the mushrooms lengthwise without cutting all the way through. 
2 Turn the mushrooms 90 degrees so they're horizontal. Cut the mushrooms from top to bottom without cutting all the way through.
3 After scoring the mushrooms on both angles, cut them into 1-1 1/2 inch pieces. 
4 Peel and slice the ginger into 6-8 slices. 
5 Thinly slice the garlic cloves with your knife (or mandoline)
6 Dice 1/2 red onion and chop the celery stalks into bite sized pieces. 
7 In a pot, heat 3 tablespoons of oil over high heat. Toss in the mushrooms and cook until golden brown on both sides. 
8 Cook mushrooms until tender, about 3-4 minutes. Remove and set aside in a bowl.
9 In the same pan, add 1 tablespoon of oil over medium heat. Add the ginger and cook for about 1 minute, followed by the sliced garlic.  
10 Toss in the red onion and celery. Stir fry for about 2 minutes. 
11 Reduce the heat to low and add 1.5 tablespoons of the spicy bean sauce. Mix well.
12 Stir in the mushrooms. Season with soy sauce and sugar. Add the green peppers and stir fry for another 2 minutes.
13 Serve with rice and enjoy!