I eat about the same number of calories and have to have protein/fibre rich diet, so this is my usual plan.
At the start I weighed everything and logged it all in myfitnesspal until I got the portion sizes right.
Breakfast: (make night before), scoop of chia seed + oats and leave to soak (I use coconut water, but could use milk or water), I also add flavour (at the moment cardamon pods and dried cranberries). I the morning warm up or have cold. I sometimes add coconut flakes, honey or some collagen protein powder.
Lunch: 2x scrambled eggs, I add some parmesan, and serve with rocket leaves and tomato (sometimes I add smoked salmon, or one chipolata)
Snack: Protein shake + 100g berries, or a sometimes I have some tinned fish (eg sardines) or carrots & hummus
Dinner: some plain chicken breast, steak or fish - there's loads of ways to add flavour (herbs, rubs etc). Either add vegetables (sprouts, leeks, carrots, peas, cabbage, sweet potato+lentils) or salad (plus a few croutons). Follow by 2 squares of 75% dark cholcolate
If I'm out at lunchtime I either swap the meals around, or make a double portion of dinner for lunch the next day.