The first basket of chips and salsa comes free at Casa Blanca, a Mexican restaurant tucked into an Arvada strip mall — and that first basket is so addictive, you'll find it hard to resist ordering more. The kitchen makes batches of firm, crisp corn chips, hot and thick and grease-free. They're served with a small bowl of tangy, piquant salsa, which has the bite of green and white onions, fresh cilantro and pungent oregano, all blended with tomatoes until smooth. The sauce incites a back-palate burn and leaves a sting of heat on the lips — the exact level of heat that entices you to keep taking bites in order to stave off the fire.