Heat 1 Tablespoon of the oil in a large skillet over high heat. Add bell pepper, fennel, half of the crushed pepper flakes and salt to taste. Cook, stirring often, until vegetables begin to brown at the edges, 6 or 7 minutes. Transfer to a mixing bowl and add half of the lemon juice.
Add 1 Tablespoon oil to pan. When hot, add shrimp, remaining pepper flakes and salt to taste. Cook Stirring, until shrimp are pin, 2 to 3 minutes, adding remaining lemon juice and garli just before it is taken off the heat. Add to vegetables
Add remaining ingredients, including the remaining 1/2 Tablespoon oil, and mix well. The salad can be served when it cools to room temperaturor chilled overnight. Adjust the seasoning at serving time.