Step 1

Heat avocado oil in a large skillet over medium heat. Add shrimp; sprinkle with salt and pepper. Sauté for 2 minutes. Add garlic and cook, tossing, until shrimp are opaque and light pink and no gray tone remains, 1 to 3 minutes. Transfer shrimp mixture to a medium bowl.

Step 2

Whisk lemon zest, lemon juice, mustard, and honey in a large bowl. Add olive oil in a slow, steady stream, whisking constantly. Whisk in 1/2 teaspoon salt and 1/4 teaspoon pepper. Fold tomatoes, cucumber, and herbs into dressing, then fold in avocado and shrimp.

Step 3

Divide lettuce among 4 plates. Spoon shrimp mixture evenly over lettuce. Sprinkle with pepper.