"Instant Pot Mountain Meatballs--tennis ball sized meatballs stuffed with cheese and brushed with a delicious tomato-vinegar glaze...."
INGREDIENTS
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1 pound extra lean ground beef
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1 pound ground pork
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1 cup panko bread crumbs
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2 eggs
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1 Tbsp dried minced onion (or ¼ cup diced onion)
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1 ½ tsp kosher salt
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½ tsp pepper
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1 (8 oz) can tomato sauce
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1 ½ Tbsp white vinegar
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1 ½ Tbsp brown sugar
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1 Tbsp yellow mustard
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1 Tbsp Worcestershire sauce
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¾ cup shredded or 24 cubes of cheddar cheese