If you aren't cooking then you could buy ready made roast chicken - ditch the skin if they added sugar to brown it.
Boil a panful of eggs for 7 mins (take them out of the fridge for an hour at least first so they don't crack), eat as is or make a 'sandwich' with lettuce leaves and sugar free mayo.
If you can face trying it buy cheap cuts of salmon and bake or grill, add lemon juice plus black pepper and eat with microwaved pack of green veg. I wrap mine in foil and bake for about 15-20 mins depending on how thick the fillets are. Or I place them between two plates and cook in the microwave. They are done when you can open a the centre of a fillet into flakes with a fork.
Any recipe that includes pasta can be made without, just use less water/stock. I make a turkey mince spaghetti bolognese that I eat with pasta, adding broccoli and cheese.