Add Greek yogurt to a bowl. This is your base, your foundation, your sauce soulmate. Make sure it’s smooth and cold.
Mix in garlic, lemon juice, and mustard. Stir like you mean it until everything looks evenly blended and creamy.
Season it properly. Add salt, pepper, and your spice of choice. Taste it—yes, tasting is part of cooking.
Adjust the texture. Too thick? Add a splash of water or low-fat milk. Go slow—this isn’t soup.
Chill or use immediately. It’s good right away, but even better after 10–15 minutes in the fridge.