Why don’t you ask her what she likes? Most meals can be made vegan - pasta with mushroom sauce, Puy lentils in a spicy tomato sauce with a sweet potato topping, bean burgers , chick pea tagine, sesame crispy fried tofu with a stir fry, cashew nut and coconut curry chillies etc. You can buy quite a few decent vegan sausages and burgers ready made now, plus ice cream , yoghurt, oat milk .
For inspiration go the Veganuary website which has lots of beginner recipes, or try the BOSH all plants cookbook.