Crab, Grapefruit and Watercress Salad

Ingredients

• 3 tablespoons champagne vinegar
• 3 tablespoons honey
• 2 tablespoons chopped sweet onion
• 1 teaspoon Dijon mustard
• 1/2 teaspoon sea salt
• 1/2 cup canola oil
• 1 tablespoon poppy seeds
• 2 cans (6-1/2 ounces each) jumbo lump crabmeat, drained {Maria: the flavor of jumbo lump crabmeat is much better than plain old lump crabmeat plus it's more tender, so please be sure to get jumbo. thx!}
• 6 cups watercress
• 2-1/2 cups fresh grapefruit segments
• 12 cherry tomatoes, halved
• 1 medium ripe avocado, peeled, pitted and sliced
• 1-1/2 teaspoons white grapefruit juice