Whatever the season, burgers remain America's favorite sandwich. When it is too cold to grill outdoors, broil the patties or use an indoor grill. In addition to the standard fixings--ketchup, salsa, onions and tomatoes--make your burgers more nutritious by adding dark greens, such as watercress or spinach.

Ingredients

• 2 slices whole-wheat country bread, crusts removed, torn into pieces
• 1/3 cup fresh or frozen and thawed blueberries
• 1 tablespoon balsamic vinegar
• 2 teaspoons Dijon mustard
• 1 teaspoon Worcestershire sauce
• 2 cloves garlic, minced
• 1/4 teaspoon salt, or to taste
• Freshly ground pepper, to taste
• 12 ounces 90%-lean ground beef

Directions

• Place bread in a food processor and pulse into fine crumbs. Transfer to a large bowl. (No need to wash the workbowl.)
• Add blueberries, vinegar, mustard, Worcestershire, garlic, salt and pepper to the food processor; process until pureed. Scrape into the bowl with the breadcrumbs. Add ground beef and mix well with a potato masher. Divide the mixture into four equal portions; form into 1/2-inch-thick patties, about 4 inches in diameter.
• Meanwhile, preheat broiler or heat an indoor or outdoor grill to medium-high. If using the broiler, coat a broiler pan with cooking spray. If using a grill, oil the grill rack by rubbing it with an oil-soaked paper towel. Cook patties until browned and no longer pink in the center, 4 to 5 minutes per side. An instant-read thermometer inserted in the center should register 160 degrees F. Serve immediately, with or without rolls and toppings.