“Palm Royale” is onto something with this one. Credit: gettyKey PointsThis tangy, tomato-based sauce from the 1960s is making a flavorful comeback in modern kitchens.A mix of pantry staples creates this versatile dipping sauce.Perfect with savory meats, this easy-to-make sauce gets even better after a night in the fridge.During a recent catch-up session of the Apple TV+ show “Palm Royale,” a quirky condiment caught my eye. There’s a scene in the…