Heat large skillet or wok over medium-high heat. Add ground pork. Break apart and cook until browned and cooked through, about 5-7 minutes. Remove and set aside.
Add frozen green beans and cook for 3-5 minutes until starting to blister.
Add canola oil and minced garlic and ginger and stir-fry for another 1-2 minutes until fragrant.
Stir in drained beans, sweet peppers and cooked pork. Stir to combine well and heat through.
In small bowl, whisk together soy sauce and cornstarch until dissolved. Add brown sugar, beef stock, hoisin sauce, rice vinegar, sesame oil, hot pepper flakes.
Pour sauce over pork and beans, stirring well to coat everything evenly. Cook for an additional 2-3 minutes until the sauce thickens and coats the ingredients.
Taste and adjusting seasoning as needed.
Serve the pork and bean stir fry hot over cooked rice.
Tips
Substitutions:
Hoisin Sauce: Replace the salty/sweet/tangy flavour of hoisin sauce by using more soy sauce and sugar or use a sweet and sour sauce.