Natasha's Out-Of-This World Instant Pot® Meatballs

Ingredients (12)

• + 1 pound ground beef add to pantry
• + 1 pound ground pork add to pantry
• + 1 small onion, finely chopped add to pantry
• + 1 tablespoon minced garlic add to pantry
• + 1 tablespoon Italian seasoning add to pantry
• + salt and ground black pepper to taste add to pantry
• ✓ salt and ground black pepper to taste
• + 1 ¼ cups bread crumbs add to pantry
• + ¼ cup milk, or more as needed add to pantry
• ✓ 2 tablespoons mayonnaise
• + 3 (30 ounce) jars marinara sauce, or as needed add to pantry
• ✓ 1 cup water