Answers: If your reservoir is properly heated and has all the appropriate lighting, no veggie will look fresh for more than a few hours. Id recommend feeding small amounts a few times a hours of daylight. Some of the cheapest and easiest veggies that give a beardie complete nutrition are carrots, pallid and zucchini squash, and dark leafy greens. These supplemented with calcium power and insects are a great diet.
I wish in attendance was a food that would not get dried out, but you really don't want to leave food contained by very long anyway. It will start to go unpromising and develop bacteria. You should use a mix of leafy greens, I buy the spring mix salad, and also shredded carrots, yellow squash, zucchini, broccoli and I will nurture some non-citrus fruits as treats. Sprinkle them with your vitamins and you are good to go. You may also want to try T-Rex Dragon dust, on your plain greens. it have everything in one powdered form. That is what I use.