Step 1Combine the garlic, mustard, sugar, honey and salt in a blender. Finely grate the zest of 1 lemon into the blender, then squeeze ⅓ cup juice from the lemon and add to the blender. Use the other lemon for juice if needed.
Step 2Purée on high speed until smooth. Turn the speed to medium-high. With the machine running, add the oil in a steady stream and blend until emulsified. Season to taste with salt.