Hosting an easy, outdoor, familyfriendly party is in Tiffani Thiessen’s blood. “I grew up in Southern California, where it’s warm all the time, so we grilled a ton,” says the Saved by the Bell icon, now starring on Cooking Channel’s Dinner at Tiffani’s. “I remember my family always had the neighbors over, and all us kids would be eating and playing out on the street or in the backyard.”
Now settled in a 1920s-era L.A. home with her husband, artist-actor Brady Smith, 45, and children Harper, 6, and Holt, 22 months, her family has come to enjoy the same feeling of community. “Over the last few years we have gotten some great neighbors with kids, and we’ve become very close with them,” says Thiessen, 43. “We’ve got children of all…