Hi Lee
As you seem to be worried about the vegetables (cabbage, carrots, celery etc.) that are added to some of the bases, don't be.
The Base should be blended until really smooth, leaving you with basically a thinnish, lightly spiced vegetable (mostly onions) soup/stock.
So you won't have pieces of these vegetables in your finished curry.
This base sauce is usually then used in conjunction with Garlic and Ginger paste, Tom puree, various spices, pre-cooked meat/vegetables etc., to make the different types of curries found in the recipes here.
Hope that helps a bit
Martin