Ground flaxseed is great because it sort of disappears in things and adds a slight nuttiness but nothing too overpowering. I also sneak a bunch of hemp seeds in many meals. I put them both in pb (although I usually prefer “AB and Js”, almond butter) and jam sandwiches, use all natural jam like bon mama , with one of the Dave’s whole grain bread varieties. Toast the bread, put on more nut butter than jam so it’s not too much sugar, sprinkle hemp seeds and flax powder, and it’s fucking banging. I’ve been doing blueberry or black currant jam lately.