If this was a snake then you'd probably attempt to and they'd either refuse or eat it. However you want to feed your beardie everyday or every other day, depending on the age of course will effect how much they need to be fed. Take a 3 month old beardie compared to a 6 month old beardie, they're only 3 months apart yet have different feeding needs. The 3 month needs to eat three times a day all the time until up to around 4 months while the 6 month old beardie eats only two times a day every day up until 12 months. And of course adults 20+ months or so would be eating every other day or so, so it depends greatly on the age and your bearded dragons health.
But basically you'll want to keep feeding your beardie even when shedding.