[Review] Rustlers Flame Grilled Cheese Burger

I am not really keen on beef but decided to try the Rustlers Flame Grilled Cheese Burger so that I have tried a bit of everything in their basic range.
The beef patty was impressive after it came out the microwave as it looked like it was flame grilled.
Everything from sauce and bun were good but the only let down was the beef patty as it had these chewy gristle sinew bits that I don't like which is the main reason I am not keen on eating burgers, minced beef or sausages.