Ratatouille Sausage Bake without chickpeas

1/4 cup olive oil 1 large onion , thinly sliced 4 garlic cloves , chopped 1 medium eggplant , washed and cubed 1 small green bell pepper , deseeded and cubed[...]

4 lean good-quality sausages (venison are the leanest, otherwise opt for lean pork or beef) 4 bell peppers , quartered and then halved if pieces are very[...]