Replace minced beef with TVP, Quorn mince or puy lentils in stuff like Shepherd's Pie, chilli, lasagna, spag bol.
Use Quorn sausages for sausage and mash, toad in the hole, sausage stew
Ditto Quorn "Chicken breasts" in chicken casserole, roast dinner etc
Or, more pulsey and less fake-meaty
Lentil bake - fry and onion and garlic, add a tin of toms, teaspoon of marmite/veg stock cube, cup of red lentils, cup of water. Cook up until lentils are soft (about half an hour), add more water as needed, layer with sliced potato/sweet potato, sprinkle with grated cheese, bake for about 45 mins, gas 6ish.
Chickpea stew - stew up courgettes, onion, aubergine, mushrooms, peppers and a can of chickpeas. I flavour with cummin and cinnamon.
Veg chilli - with chunks of sweet potato and kidney beans
Veg burgers - cheating method - stuffing mix (chestnut is good), bag of chopped nuts, other veg and herbs/spices of choice. Cover in beaten egg then dip in flour/breadcrumbs/polenta/semolina and fry
Eggs - tortilla is a big hit with my 3 yo
Stir fry - with cashews or tofu or Quorn instead of meat