Multiple entities in schema.org - schema.org

Question

How do I nest one or multiple recipes in a NewsArticle or BlogPosting.
I tried this but Google's Structured Data Testing Tool throws an error complaining about recipe1 key. I'm not sure what to change recipe1 key to:
<script type="application/ld+json">
{
"#context" : "http://schema.org",
"#type" : "NewsArticle",
"author" : { "#type" : "Person",
"name" : "hgezim"
},
"dateModified" : "2016-09-21T06:25:35+00:00",
"datePublished" : "2016-09-21T06:25:35+00:00",
"headline" : "Chicken Papriak",
"mainEntityOfPage" : "http://localhost:8080/2016/09/21/chicken-papriak/",
"publisher" : { "#type" : "Organization",
"name" : "Dev Blog"
},
"recipe1": {
"#context": "http://schema.org",
"#type": "Recipe",
"author": "John Smith",
"cookTime": "PT1H",
"datePublished": "2009-05-08",
"description": "This classic banana bread recipe comes from my mom -- the walnuts add a nice texture and flavor to the banana bread.",
"image": "bananabread.jpg",
"recipeIngredient": [
"3 or 4 ripe bananas, smashed",
"1 egg",
"3/4 cup of sugar"
],
"interactionStatistic": {
"#type": "InteractionCounter",
"interactionType": "http://schema.org/Comment",
"userInteractionCount": "140"
},
"name": "Mom's World Famous Banana Bread",
"nutrition": {
"#type": "NutritionInformation",
"calories": "240 calories",
"fatContent": "9 grams fat"
},
"prepTime": "PT15M",
"recipeInstructions": "Preheat the oven to 350 degrees. Mix in the ingredients in a bowl. Add the flour last. Pour the mixture into a loaf pan and bake for one hour.",
"recipeYield": "1 loaf",
"suitableForDiet": "http://schema.org/LowFatDiet"
}
}
</script>

Answer 1

It depends on how the entities are related to each other. You have to use a property that is defined to convey this relation.
To look for a suitable property, check BlogPosting for properties that have Recipe or one of its parent types (CreativeWork, Thing) as expected value.
For example:
about could be used if the blog post is about this specific recipe (e.g., you describe how you liked it)
hasPart could be used if the recipe forms a part of the blog post
mentions could be used if you just reference this recipe in the blog post
…

Answer 2

Thanks #unor. I've used hasPart as follows:
<script type="application/ld+json">
{ "#context" : "http://schema.org",
"#type" : "NewsArticle",
"author" : { "#type" : "Person",
"name" : "hgezim"
},
"dateModified" : "2016-09-21T06:25:35+00:00",
"datePublished" : "2016-09-21T06:25:35+00:00",
"hasPart" : { "#context" : "http://schema.org",
"#type" : "Recipe",
"author" : "John Smith",
"cookTime" : "PT1H",
"datePublished" : "2009-05-08",
"description" : "This classic banana bread recipe comes from my mom -- the walnuts add a nice texture and flavor to the banana bread.",
"image" : "bananabread.jpg",
"interactionStatistic" : { "#type" : "InteractionCounter",
"interactionType" : "http://schema.org/Comment",
"userInteractionCount" : "140"
},
"name" : "Mom's World Famous Banana Bread",
"nutrition" : { "#type" : "NutritionInformation",
"calories" : "240 calories",
"fatContent" : "9 grams fat"
},
"prepTime" : "PT15M",
"recipeIngredient" : [ "3 or 4 ripe bananas, smashed",
"1 egg",
"3/4 cup of sugar"
],
"recipeInstructions" : "Preheat the oven to 350 degrees. Mix in the ingredients in a bowl. Add the flour last. Pour the mixture into a loaf pan and bake for one hour.",
"recipeYield" : "1 loaf",
"suitableForDiet" : "http://schema.org/LowFatDiet"
},
"headline" : "Chicken Papriak",
"mainEntityOfPage" : "http://localhost:8080/2016/09/21/chicken-papriak/",
"publisher" : { "#type" : "Organization",
"name" : "Dev Blog"
}
}
</script>
It validates as validates JSON-LD.