Berbere Chickpea Pizza

Name: Berbere Chickpea Pizza
Cuisine: Asian, Middle Eastern
Ingredients: 1 tsp coriander seeds; 1/2 tsp cumin seeds; 1/2 tsp black peppercorns; 1/4 tsp fenugreek seeds; 1/4 tsp mustard seeds; 1/4 tsp nigella seeds; 2 cloves; 1 green cardamom; 1 tbsp paprika; 1 tsp cayenne powder; 1/2 tsp salt; 1/2 tsp turmeric powder; 1/4 tsp ginger powder; 1/4 tsp onion powder; 1/4 tsp garlic powder; 1/8 tsp cinnamon powder; 1/8 tsp nutmeg; 2 cups cooked chickpeas; 1 tbsp oil; 1 tomato, sliced; 1 green pepper, sliced; 1 medium onion, sliced