Arrange the shrimp, avocado, grapefruit, and lettuce on a plate.
Place the dressing ingredients in a blender and process for just a minute or two.
Pour the dressing over the salad and top with the pecans.
Notes
Cooked Shrimp - if you don't have cooked shrimp, my favorite way to cook them is to roast them in the oven. Toss them with a little olive oil, salt and pepper and spread on a baking sheet. Roast in a preheated 400 degree oven for 6-8 minutes.
Grapefruit - pink or white.
Salad Mix - watercress or baby lettuce
Toasted Pecans - toast pecans in a dry skillet over medium high heat until fragrant.
Limes - juice of 3 limes. Zest the limes before juicing and store the zest in freezer to use in another recipe.
Cilantro - use the leaves, save the stems for soup.
Green Chili Pepper - seed if you don't want the heat. I used a jalapeño.