I'm very sorry to hear of the sad turn your life and that of your daughter has taken and hope things resolve themselves quickly. In the meantime, here are some easy meal suggestions:
Panfry chicken breast pieces, salmon or tuna - enough for several meals. Add things like herbs or garlic or hoisin sauce or an Asian style dressing if you like, or serve the chicken with some curry flavoured Greek yoghurt.
Oven-roast a large batch of bell peppers, courgettes, aubergine, onions, garlic. Coat them lightly with olive oil, salt and pepper, and add a splash of balsamic vinegar about 5-10 minutes before they are done (they need c. 30-40 minutes at 190C). Add some herbs like parsley or basil and/or chilli flakes after they are done if you want to. Serve as a side to the meat/fish or mix with quinoa, wild rice or wholewheat pasta. Also nice as an addition to salad.
Broccoli soup. Boil then add a chicken stock cube, salt, pepper, a little chili if you like it, blend and add a little cream or crumbled cheese (Stilton is especially nice).
Lemony lentil soup. Use green lentils if possible. Towards the end, in a separate pan, gentle fry several cloves of garlic with a couple of teaspoons of cumin for a couple of minutes and add to the lentils, along with lots of lemon juice.
Salad as a meal: add lentils, chickpeas and/or black beans to shredded red cabbage, carrots, lettuce, onions, tomatoes, cucumber, etc. Spice up dressings with mustard or horseradish or balsamic vinegar. Add herbs, e.g. dill or parsley. Top with cooked chicken, salmon or, or boiked eggs.(tinned) tuna.
Tabbouleh made with quinoa instead of burghul. Lots of parsley plus finely cut onion and tomatoes in a lemon and EVOO dressing.
Omelettes! Add (smoked) salmon or finely cut leftover vegetables to make them a meal.
These are my easy go-to dishes that I love.