oil in a small bowl. Stream in oil and whisk until combined. Season with black pepper to taste.
Prepare salad: toss all vegetables, olives and avocado in a medium size salad bowl. Set aside.Heat a grill pan or a medium-size skillet with the olive oil over medium-high heat.
Season shrimp with sea salt and pepper. Add shrimp to pan and cook about 2-3 minutes on each side or until shrimp turn opaque and pink.
Meanwhile, add the dressing to the salad and toss to coat.If using greens, divide into 4 bowls. Place about 1 cup of chopped, dressed salad in each bowl.