It is difficult to support more recipe formats because they are more generic than MealMaster. But I can take a look.
Recipe: https://www.bbc.co.uk/food/recipes/tofu_peanut_stir-fry_6272...
Google review tool: https://search.google.com/structured-data/testing-tool#url=h...
From command line:
curl https://www.bbc.co.uk/food/recipes/tofu_peanut_stir-fry_6272... | grep -o -P '(?<="application/ld\+json">).*(</script)'