I do occasionally use the oven but as pp suggests only early in the morning, I throw everything in though then we can eat it cold later.
Any meat, whole chicken, beef joints etc
Pizza, kebabs etc. all fine to eat cold I. Sandwiches, wraps or with a salad later. Cold boiled potatoes can be used in a similar way.
Agree with pp. Can you get a plug in hob similar and do you cooking on a balcony?
Tbh I enjoy lots of cold food in the summer.
Potato salad, coleslaw, cold roast chicken, boiled eggs, cold sausages.
I do make lots of cold salad options. Grated carrot salad with coriander, cucumber yogurt and dill salad, tomato salsa
Hob options. Quesadila, grilled cheese (butter the outside of a sandwich and fry on both sides, lush!!) stir-fry, cook on a high heat to minimise cooking time.