Place large saute pan over high heat, All olive oil, then onion, garlic, cumin, thyme, anchovies and lemon peel, 1/2 tsp salt and a good grind of pepper. Fry, stirring often till soft and golden. Decrease heat to med-high, add chickpeas and sugar and fry , stirring occasionally, till chickpeas begin to brown and crisp up. Add chicken stock and lemon juice and simmer 6 mins, till sauce slightly reduced. Remove from heat and hold. (Can make ahead) If you are going to add tomatoes, I would do so along with chicken stock and lemon juice.