Linseeds (yellow flax seeds)
£0.50 for 100g
The richest plant source of omega 3 fats, lignans, fibre and phytoestrogens. Ground linseeds are easier to digest (grind in a coffee grinder).
Add them to drinking water; sprinkle on breakfast cereal; mix with yoghurt; add to baking mixes; mix into smoothies; add to water as egg substitute.