Why does my chard taste bitter when I cook it? I've tried cooking it in various ways, but it always ends up tasting bitter. What am I doing wrong? I'm using fairly young chard (homegrown), using the whole leaves.
Your chard most likely tastes bitter because chard is bitter.  You can't really change that with cooking technique alone, but you can:


Use older chard, which tends to be markedly less bitter than the young chard you're using;
Avoid bringing out the bitterness, by cooking at lower heat;
Mute any remaining bitterness with salt, which is pretty common for leafy greens.