Rogan josh.
Fry a diced onion, add diced garlic, add other veg as desired (peppers, mushrooms, courgette, French beans, peas, broccoli florets, cauliflower florets, etc a mix that you like), add half a small tin sweet corn, add a tin of tuna (if using one in oil, you can use the oil for the initial frying), add in 3 tablespoons of mild curry powder and stir well, then add a pack of instant microwave rice and stir well, ready once rice is thoroughly heated through. Could also add some cooked chicken or prawns if you have those (less likely when camping but this is a great "use up small amounts of lots of stuff and storecupboard ingredients" type dinner at home too).
Fry bacon lardons (I use Lidl ones, and can throw into dry pan to use the bacon fat that melts out for rest of frying), (diced onion and/or garlic), diced mushrooms, set aside in bowl. Cook pasta, drain, toss bowl back in and either add jar of Bertolli pesto Rossa or a mix of double cream and an egg whisked together for the sauce. (Could cook pasta first and set aside, but other ingredients reheat faster when they are mixed, cover bowl with foil and wrap in a towel to preserve heat if you want).
Spanish style omelette filled with chicken or ham or chorizo, veggies and cheese.
Buy a hot rotisserie chicken and crunchy French stick/nice sourdough from deli at teatime, enjoy with salad.
Do you have access to a bbq or fire, even one use bbq grills can be useful to grill meat and also do veg etc in foil parcels or on skewers.