I have allergies, so have to always do fake-always for most things. My fridge is always loaded with a good range of veg. I would also get a good mix of spices, I literally have a whole cupboard and use them all and buy in bags rather than little glass jars, then when I finish a coffee jar, that becomes my spice container. Spice is life basically, can turn anything into something tasty.
Rasta pasta. I don't eat meat, but you can add chicken, but not really needed. With garlic bread. Make normal Mac n cheese, but add in pepper, onions (chicken) and a dollop of jerk seasoning. Scrum, always a clear plate in my house.
Batch cook, then buy bigger amounts of meat, soya or swap for green lentils as very meaty texture.
Chilli con carni - then turn the left overs into Buritos.
Spaghetti Bol - left overs into lasagne
Chinese stir fry
Taco's
Shepherds/cottage pie
Curry, dhal and rice.
Shawarma
Thai green curry
Steamed puddings are lovely and very filling. Cook in the slow cooker and you get a crust around the edge.
I think you just have to have a mix, so don't just keeping eating, rice, pasta or potatoes.
I also cook foods from around the world and will give anything a try. I like my food to cover the rainbow, so have lots of colour.
Don't be afraid to try something new, variety is the spice of life. If you eat at someone's house, don't be afraid to ask for the recipe and give it a go yourself.