"Instant Pot Meatball Sub Soup--all the flavors from the sandwich in soup form. Made fast and easy in your Instant Pot (or slow cooker)...."
INGREDIENTS
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1 Tbsp olive oil
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1 cup diced onion
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1 Tbsp minced garlic
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3 cups beef broth
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1 ¼ pounds frozen Italian meatballs
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1 (28 oz) can crushed tomatoes
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2 Tbsp tomato paste
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1 tsp dried oregano
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1 cup milk
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1 cup shredded mozzarella cheese
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½ cup shredded parmesan cheese (plus more for topping)
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Salt and pepper to taste
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Baguette slices, garlic bread or breadsticks for serving