Ideas for low calorie meals to maintain weight (cannot exercise)

I was recently in an accident and cannot exercise; particularly, I cannot put weight on my feet or lay my feet on the ground. Consequently, I have to maintain my weight purely through diet. I typically aim for around 1300 calories/day.

So far I have:

• breakfast: fried egg/egg white on toast with a glass of water (about 200 cals)
• lunch: chicken breast, small piece of bread, with a large spinach salad (about 300 cals)
• afternoon snack ?
• dinner ?

Thank you.