Chili sin carne

Name: Chili sin carne
Ingredients: 1/4 cup vegetable oil; 1 onion, thinly sliced; 1/2 teaspoon coriander seeds, dry roasted and crushed; 1 teaspoon cumin seeds, dry roasted and crushed; 1 teaspoon tomato puree; 400 milliliters passata or sieved tomato sauce; 1-2 cloves garlic, minced or chopped in small bits; 1 teaspoon paprika; 200 milliliters vegetable stock (or made up with a stock cube and water); 125g kidney beans (from a tin, rinsed and drained); 125g white beans e.g cannellini (from a tin, rinsed and drained); 1-2 teaspoons granulated sugar; chili pepper , to taste; salt and pepper, to taste