By Ayeesha Walsh Gisele Bundchen has stepped out publicly with her new boyfriend Joaquim Valente for the first time since they confirmed their relationship. The Brazilian supermodel was seen heading out in Miami with the jiu-jitsu pro as they went to take a look at her property there which is currently under construction. Gisele, 43, wore a pair of flared jeans teamed with a baggy shirt which she wore tucked-in for the outing. She went make-up free showing off her natural beauty and wore her trademark tousled blonde hair up in a loose bun. Gisele added an on-trend pair of flat brown loafers an…