Shrimp, Avocado, and Grapefruit Salad

Whisk mayonnaise, ketchup, honey, and vinegar together in a bowl. Add diced red onion, salt, and pepper. Place a damp cloth under the bowl to keep from moving; add olive oil very slowly in a stream while whisking. Adjust seasoning if needed.

Prepare plates with a bed of mixed greens. Center avocado slices on plates, surround with grapefruit segments, and top with shrimp. Drizzle generously with honey cider salad dressing and garnish with red onion slices.