"healthy food is expensive" is a lie for the most part. It just takes slightly longer to make than an instant meal.
In the UK you can get a bag of 7 or 8 carrots for 60p, a bunch of bananas for less than £1, a bag of onions for less than £1, most vegetables are very cheap. Some fruit are expensive but that depends on the season. You might be talking £1.60 for a bag of bananas.
1kg of lentils for less than £2. 1kg of chopped tomatoes for less than £3. 1kg of spinach for less than £3.
Fruit and vegetables are absurdly cheap these days.
Sure for the same cost of all of that you can get 25 packets of cheap, barely flavoured noodles. Or you could buy half the noodles, a load of cheap vegetables, and make up a nutritious dinner.