Add the mayo, vinegar, honey and sugar in a glass jar or bowl.
Whisk or shake together until smooth. Salt and pepper to taste, then mix in the poppy seeds.
Serve over your favorite salad. This dressing stays fresh in the refrigerator up to 1 week. Shake well before serving.
Notes
Healthier swaps: Use Greek yogurt instead of mayo, or omit the sugar and only use honey. Vinegar: You can use white vinegar, apple cider vinegar or even raspberry vinegar.