Eggplant and beef hotpot

Ingredients (6 servings): 80ml (1/3 cup) olive oil 1 (about 450g) eggplant, cut into 3cm pieces 800g beef chuck steak, cut into 3cm pieces 2 brown onions, coarsely chopped 3 garlic cloves, coarsely chopped 1 tablespoon ground cumin 2 teaspoons ground coriander 1 teaspoon ground allspice 70g (¼ cup) tomato paste 3 ripe tomatoes, coarsely…