Heat Oil: In a wide frying pan, heat vegetable oil over medium heat.
Cook Onion: Add chopped onion and sauté until translucent.
Add Cabbage and Scallion: Add chopped cabbage and scallion, and cook until cabbage wilts.
Add Peas: Stir in frozen peas and cook for a few minutes.
Incorporate Stewed Pork: Add leftover stewed pork, scraping down any fat for flavor.
Add Hoisin Sauce: Make a hole in the center and add hoisin sauce, allowing it to warm up.
Add Rice: Add leftover rice, breaking it up and mixing it with the other ingredients.
Finish with Tomatoes: Add halved cherry tomatoes and adjust seasoning with salt and pepper.
Create Crust: Let the mixture sit without stirring to form a crust at the bottom.
Serve: Once heated through and crusty, serve hot.