Reinhart (Brother Juniper's Bread Book, not reviewed) is back with philosophical musings and recipes from the California restaurant he and his wife began as members of a Christian order. (He has since sold his interest in Brother Juniper's CafÇ, named after a hapless but generous monk.) His writing is cheerily helpful, and he exhibits a quirky sense of humor in relating episodes like the time he visited Israel with his Jewish father and was expelled from the Mosque of Omar for engaging in prayer. (``Only Muslims may pray here...It is the rules of the management,'' a guard insisted.) Recipes are straight out of the Chez Panisse school--the black-bean chili was inspired by a very similar dish served at San Francisco's top-flight vegetarian restaurant Greens--but Reinhart gives preparations an original spin. A simple mesclun salad is enhanced by fresh herbs and a lemony caper dressing, and hummus gets a lift from freshly toasted sesame seeds pureed with olive oil in place of the usual pre-fab tahini. On the other hand, a heavy dose of buttermilk intended to moisten oversize lemon muffins instead gives them an unbearably acidic taste. Reinhart apparently has the heart of an entrepreneur: He has marketed a bottled barbecue sauce called Holy Smoke and admits to fantasies about ``putting Coke and Pepsi out of business'' with natural brews like root beer made with sarsaparilla and wild cherry bark. Spiritual (not preachy) and sweet (not saccharine).