I don't think we eat a lot Nicky but like you we each eat 3 portions of fruit and mostly 5 -6 portions of veg (counting salad in there too)
For instance, while i am very grateful that we have good food available to eat, I don't think we ate excessively luxuriously today:
Breakfast: DH & I had porridge made with low fat milk & water, blueberries and raspberries, drizzle of honey, small glass of orange juice, fresh coffee with hot low fat milk.
DD (11) had cheerios with full fat organic milk, and juice
Lunch: we were using up stuff in the fridge before shopping tomorrow so I had 2 x slices of toasted rye bread with butter and 2 (free range organic) poached eggs.
Dh had 2 x slices of rye bread with tomato,cheese, salami and coleslaw.
DD had some frozen pizza, cucumber and cherry tomatoes (this is rare - she would usually have cheese on toast / bread roll and banana / soup and brown bread etc)
After lunch we had a real coffee and a biscuit
DD had some christmas chocolate and some watermelon
Dinner: roast (free-range)chicken, roast potatoes, broccoli, peas and sweet potato mash, gravy
sparkling water to drink throughout the day
This is a typical day for us and there is NO way I could do this for £50 or less per week