"These Instant Pot meatball sandwiches are made with frozen meatballs and savory homemade marinara sauce for a fast kid-friendly dinner...."
INGREDIENTS
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1 tablespoon olive oil
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1 red bell pepper, diced
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1 small yellow onion, diced
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1 28-ounce can crushed tomatoes in puree
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1 1/2 teaspoons garlic powder or 2 garlic cloves, minced
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1 teaspoon dried basil
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1/4 teaspoon crushed red pepper flakes
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1/4 teaspoon salt
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1/2 cup chicken broth or water
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1 24-ounce bag frozen fully cooked Italian meatballs
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4 crusty sub rolls, toasted
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2 cups shredded mozzarella cheese