Chickpea and Chicken Tikka Masala

Name: Chickpea and Chicken Tikka Masala
Ingredients: 1/4 Cup oil (olive / vegetable); 1 medium onion, thinly sliced (1 & 1/2 cup); 1 lb chicken breast, cut into 1-inch pieces; 1 tsp salt or to taste; 2 Tbsp ginger & garlic paste; 1 tsp garam masala; 1 tsp ground cumin; 1 tsp curry powder; 2 tsp smoked paprika; 1/4 tsp cayenne; 3 Tbsp tomato paste; 1 can chopped tomato; 1 cup vegetable broth; 1 (15 ounce) can chickpeas / garbanzo beans drained; 1 lemon juice; basmati rice, or warm naan for serving