When it comes to ground meat (or most any meats for that matter), it's a simple equation: fat equals flavor and moisture.

It would follow then that a low-fat burger should be dry and tasteless, right? Not necessarily.While it may be tempting to go for 90 or 95 percent lean ground beef or turkey when crafting a leaner burger, the results will be disappointing. A better choice is to use a juicier 85 percent lean meat and find other ways to cut the fat.The secret is in knowing how to pad your patty by using some healthful ingredients mixed into the ground meat that can enhance the flavor while also reducing the amount of meat (and fat) in each burger.Ingredients such as whole-grain breadcrumbs, couscous or prepared bulgur often are used for making meatballs and meatloaves, and they work just as well in burgers, too.As a rule of thumb, it's best not to add filler at more than a one-to-three ratio to the meat; otherwise the hamburger patties will tend to fall apart, especially on the grill.Dry ingredients also tend to work better than moist ones.If you'd like to use vegetables to bulk up your burgers, it's best to drain the ingredients well.For instance, you can use flavor-packed roasted red peppers or sun-dried tomatoes, but be sure to thoroughly blot away any excess packing liquids with paper towels before chopping and adding to your meat.This recipe for chili turkey burgers uses black beans to reduce fat while adding extra bulk and fiber. The beans are mashed with sautéed onion and garlic that have been spiced with ground cumin and minced jalapeño.This mixture then is combined with lean ground turkey (not the 99-percent lean kind!), and a few tablespoons of tomato paste for a touch of acidity and extra binding power.For more daring palates, you can jack up the heat by adding a few more chilies, a few dashes of your favorite hot sauce or using habaneros instead of the tamer jalapeños.Chili TurkeyBurgersStart to finish: 35 minutes. Servings: 41 teaspoon canola oil1 small sweet onion, finely chopped3 cloves garlic, minced1 jalapeño pepper, seeded and minced2 teaspoons ground cumincup canned black beans, rinsed2 slices firm whole-wheat bread, torn into small pieces2 tablespoons tomato paste2 tablespoons chopped fresh cilantro1/2 teaspoon salt1/2 teaspoon ground black pepper1 pound lean ground turkey4 whole-grain hamburger bunsTomato salsa, for toppingShredded lettuce, for toppingIn a small nonstick skillet over medium, heat the oil. Add the onion and sauté until lightly colored, about 4 minutes. Add the garlic, jalapeño and cumin. Cook, stirring often, until fragrant, 1 to 2 minutes longer. Transfer to a dish to cool.Heat a gas grill to medium-high or light a charcoal fire. Meanwhile, in a food processor, combine the beans, bread and tomato paste.Pulse until well mashed, then add cilantro, salt, pepper and reserved onion mixture. Pulse several more times, then transfer to a bowl. Add ground turkey, mix well, then shape into four -inch-thick patties.Grill burgers until they register 165 F on an instant thermometer, about 5 minutes per side. Meanwhile, toast the buns on the edge of the grill. Serve the burgers topped with tomato salsa and shredded lettuce.