I was making great bread with the normal 7g sachets of dried yeast, then switched to Doves Farm Quick Yeast and it's eadible but not at all as light, fluffy or high as it was before. Has anyone else had this? I'm confused about how much yeast to put into a large (450/500g white flour) loaf as I have seen the amount vary between 1 and 3 tsp. I've used different amounts of Doves yeast but the bread is still a bit rubbish looking. Can anyone help?