Planning a big cookout for the fourth? Or are you cooking in because your guest list is large and your barbecue grill is small? Cooking a large meal indoors in summer produces as much heat as running the furnace -- and cooking with gas creates moisture, too. The result is everyone is uncomfortable, and the air conditioner runs longer -- wasting money. Instead, before you light the kitchen stove and fire up the oven, make a quick trip down to the store and check out the new breed of mega-grills -- the ones that function like an outdoor kitchen. They start with lots more grilling surface and nifty insert modules with woks, porcelain pots, cast-iron griddles, roast-holders and rotisseries and computerized temperature probes that beep when meats are perfectly done. There are big, new electric, charcoal- and wood-burning models -- and motorized smokers that feed in aromatic wood pellets automatically. It's a great way to cook for big groups on big holidays and to give indoor cooks outdoor independence. And that's the On The House tip for today.