I don’t do lasagne from scratch any more: too much faff.
My recommendation is a traybake. Get a big baking tray and drizzle a bit of oil in the bottom.
Add any protein you like: chicken pieces, pork pieces, salmon fillets etc.
Then add chopped veg: potatoes, onions, peppers, courgettes, aubergine, cherry toms, sweet potatoes, fennel, anything you have in. Chunks of fancy bread are good too but add them towards the end so they don’t get incinerated.
Add something for flavour: garlic, lemon juice, herbs or spices, crumbled feta, chunks of mozzarella, olives, chopped anchovies, splosh of wine or balsamic vinegar, chopped chorizo.
Stick in the oven at around 200 degrees for approx 30 minutes. Give it a stir a couple of times. Serve with salad.
It’s a concept that lends itself to experimentation.