My mom in her earnest harvested her rhubarb early and sent me stalks that are indiscernible from celery. It tastes very tart which I like but has very faint "rhubarby" flavors. A couple applications I have in mind are a standard cobbler and making bitters by infusing them in vodka. Is it safe to eat (i.e. does red stalk indicate that oxalic acids are no longer present in the stalks?) and how can I intensify the rhubarby flavors without overwhelming anything with the acids?