I try to eat low-dairy if I can. For lunch I had beans on toast and for dinner I made sausages with French-style puy lentils. (I made garlic bread by mixing garlic with olive oil and a bit of dairy-free butter - the Flora one in the block is good - spreading it on halved baguettes and putting it under the grill).
I've been thinking about work lunches for next week - I make a lot of soup, often roasted tomato and red pepper or what my kids call Hulk soup - basically any green veg! For the latter I add a small cubed potato as it improves the texture, but otherwise it's just onions, celery, garlic, herbs, then usually courgettes/broccoli/spinach. I add a handful of peas at the end but only cook it for another minute once those are in - it helps it keep the vibrant green colour once blended, and sweetens it a bit. Often I add nutmeg if it's spinach soup, just seems to work really well.
Salads-wise I make hummus and slow roast some cherry tomatoes in the oven or airfryer. Then I build a salad with whatever greens/leaves I have, some hummus, the tomatoes, maybe some chorizo or similar, and a really good dressing - mainly olive oil, red wine vinegar and honey. I also do the same thing with things like coronation chickpeas (recipe as you'd expect!), chopped cucumber and radish, grated carrot, sometimes a bit of cheese if I'm feeling devilish. In the winter I sometimes replace the greens with brown rice or bulgur wheat. I'm not a fan of couscous but it is blessedly quick.
Other favourite dinners are pasta with a tomato, aubergine and red wine sauce (sometimes add bacon), chicken thighs with some kind of marinade, salmon and noodles (Rukmini Iyer has a good baked salmon laksa recipe), scrambled egg and salmon on bagels, sweet potato and chicken chilli, turkey chilli, Bolognese etc. I do miss the parmesan a bit so sometimes I cave...
Sadly my favourite potato dauphinoise is hard to recreate with soya cream but I like potatoes boulangere (cooked in stock) and I make good airfryer chips.
I also roast a lot of veg - cauli with cumin is delicious, serve it with some pomegranate seeds and coconut yoghurt. Sweet potato gets a bit boring but red onion, broccoli with garlic and chilli, carrots all delicious roasted. If you're just low-dairy then a tiny bit of feta sprinkled over them goes a long way.