basic carbohydrate colors colours common crop diet fibre food minerals perennial potato potatoes skin small small potatoes solanum tuberosum spud staple starch starchy texture tuber tuberous variety vegetable vitamins young Dinner eat edge knife oil owen potatoe roast sharp steel stow taste carrot carrots chopping cooking healthy kitchen meal potatos slices vegatable vegetarian apple beetroot carotte citrus egg package shell swede union white brown isolated raw reflected reflection root solanum tuberosum two drawing essential free graphic illustration image isolation photo pile stock shooting shoots