Vegetarian Tikka Masala

Name: Vegetarian Tikka Masala
Ingredients: 2 tbsp olive oil; 1 yellow onion diced; 2 tsps freshly grated ginger; 4 cloves garlic diced; 1 tsp chili powder; 1 tsp smoked paprika; 1 tsp coriander; 1/2 tsp turmeric; 1/2 tsp cumin; 1 6 oz can tomato paste; 1 13.5 oz can fire roasted tomatoes; 1 13.5 oz can full fat coconut milk; 1 cup water; 1 head cauliflower with florets separated or chopped; 2 carrots peeled; 1 green bell pepper chopped; salt and pepper to taste; 3 tbsp plain Greek yogurt